If we're going simply by 40 time, Greenway and Long are comparable. Greenway ran a 4.76 40 time while Long ran a 4.75 40 time. The difference being? Long weighed 30 more pounds when he ran his time.
20 yard dash
Long: 2.70
Greenway: 2.75
10 yard dash
Long: 1.53
Greenway: 1.61
20 yard shuttle
Long: 4.21
Greenway: 4.22
3 cone drill
Long: 7.02
Greenway: 7.01
Keep in mind, the 10 and 20 yard dashes are such low numbers, that a .05 of a second is almost the equivalent to .10 of a second in the 40 time. So Long blows him away in the quickness/acceleration drills, but is his equal in the agility drills. BTW, Greenway was considered one of the best (if not the best) coverage linebackers in that draft class.
2002-2006 would be 6 years, but whatever.
Going over the linebackers I could find since 2002, here's how their combines compared to Long's. I've added some defensive ends to the list that have played a 3-4 defense in the NFL. All these players were 1st round picks....
40 time
Ernie Simms: 4.50 (231 pounds)
Robert Thomas: 4.51 (229 pounds)
Patrick Willis: 4.51 (242 pounds)
Derrick Johnson: 4.52 (242 pounds)
Jonathan Vilma: 4.54 (233 pounds)
D.J. Williams: 4.54 (250 pounds)
Napoleon Harris: 4.55 (253 pounds)
DeMarcus Ware: 4.56 (251 pounds)
A.J. Hawk: 4.59 (248 pounds)
Kamerion Wimbley: 4.61 (248 pounds)
Shawne Merriman: 4.64 (272 pounds)*Pro Day
Bobby Carpenter: 4.65 (256 pounds)*Pro Day
Terrell Suggs: 4.65 (257 pounds)
Lawrence Timmons: 4.66 (234 pounds)
Nick Barnett: 4.67 (236 pounds)
Anthony Spencer: 4.70 (261 pounds)
Jon Beason: 4.72 (237 pounds)
Chris Long: 4.75 (272 pounds)
David Pollack: 4.75 (265 pounds)
Chad Greenway: 4.76 (242 pounds)
Calvin Pace: 4.79 (269 pounds)
20 yard dash
Robert Thomas: 2.58 (229 pounds)
Patrick Willis: 2.62 (242 pounds)
Ernie Simms: 2.64 (231 pounds)
Napoleon Harris: 2.64 (253 pounds)
Derrick Johnson: 2.66 (242 pounds)
Lawrence Timmons: 2.68 (234 pounds)
Chris Long: 2.70 (272 pounds)
DeMarcus Ware: 2.71 (251 pounds)
David Pollack: 2.71 (265 pounds)
A.J. Hawk: 2.72 (248 pounds)
Jon Beason: 2.74 (237 pounds)
Kamerion Wimbley: 2.74 (248 pounds)
Anthony Spencer: 2.74 (261 pounds)
Nick Barnett: 2.75 (236 pounds)
Chad Greenway: 2.75 (242 pounds)
Calvin Pace: 2.86 (269 pounds)
Terrell Suggs: NA
Jonathan Vilma: NA
D.J. Williams: NA
Shawne Merriman: NA
Bobby Carpenter: NA
10 yard dash
Lawrence Timmons: 1.50 (234 pounds)
Patrick Willis: 1.53 (242 pounds)
Chris Long: 1.53 (272 pounds)
Ernie Simms: 1.54 (231 pounds)
A.J. Hawk: 1.56 (248 pounds)
Robert Thomas: 1.57 (229 pounds)
Jon Beason: 1.60 (237 pounds)
Kamerion Wimbley: 1.60 (248 pounds)
Napoleon Harris: 1.60 (253 pounds)
Derrick Johnson: 1.61 (242 pounds)
Chad Greenway: 1.61 (242 pounds)
DeMarcus Ware: 1.62 (251 pounds)
Anthony Spencer: 1.64 (261 pounds)
Nick Barnett: 1.65 (236 pounds)
David Pollack: 1.67 (265 pounds)
Calvin Pace: 1.74 (269 pounds)
Terrell Suggs: NA
Jonathan Vilma: NA
D.J. Williams: NA
Shawne Merriman: NA
Bobby Carpenter: NA
20 yard shuttle
Derrick Johnson: 3.93 (242 pounds)
David Pollack: 3.94 (265 pounds)
A.J. Hawk: 3.96 (248 pounds)
D.J. Williams: 4.05 (250 pounds)*Pro Day
DeMarcus Ware: 4.07 (251 pounds)
Nick Barnett: 4.08 (236 pounds)
Robert Thomas: 4.10 (229 pounds)
Jonathan Vilma: 4.20 (233 pounds)*Pro Day
Chris Long: 4.21 (272 pounds)
Shawne Merriman: 4.21 (272 pounds)*Pro Day
Chad Greenway: 4.22 (242 pounds)
Ernie Simms: 4.23 (231 pounds)
Bobby Carpenter: 4.31 (256 pounds)*Pro Day
Lawrence Timmons: 4.32 (234 pounds)
Antony Spencer: 4.43 (261 pounds)
Napoleon Harris: 4.44 (253 pounds)
Patrick Wills: 4.46 (242 pounds)
Kamerion Wimbley: 4.48 (248 pounds)
Calvin Pace: NA
Terrell Suggs: NA
Jon Beason: NA
3 cone drill
Jonathan Vilma: 6.67 (233 pounds)*Pro Day
A.J. Hawk: 6.82 (248 pounds)
DeMarcus Ware: 6.85 (251 pounds)
David Pollack: 6.87 (265 pounds)
Bobby Carpenter: 6.88 (256 pounds)*Pro Day
Lawrence Timmons: 6.92 (234 pounds)
Kameron Wimbley: 6.98 (248 pounds)
Nick Barnett: 7.00 (236 pounds)
D.J. Williams: 7.00 (250 pounds)*Pro Day
Chad Greenway: 7.01 (242 pounds)
Chris Long: 7.02 (272 pounds)
Anthony Spencer: 7.14 (261 pounds)
Napoleon Harris: 7.15 (253 pounds)
Robert Thomas: 7.21 (229 pounds)
Derrick Johnson: 7.21 (242 pounds)
Patrick Willis: 7.23 (242 pounds)
Ernie Simms: 7.32 (231 pounds)
Calvin Pace: NA
Terrell Suggs: NA
Shawne Merriman: NA
Jon Beason: NA
Keep in mind, every one of these players were 1st round picks. Athletically, they're the cream of the crop.
Averaging out the players that participated in these drills, here's how they look like on average compared to Chris Long:
40 yard dash
Chis Long: 4.75 (272 pounds)
Average LB listed: 4.63 (248 pounds)
20 yard dash
Chris Long: 2.70 (272 pounds)
Average LB listed: 2.70 (246 pounds)
10 yard dash
Chris Long: 1.53 (272 pounds)
Average LB listed: 1.60 (246 pounds)
20 yard shuttle
Chris Long: 4.21 (272 pounds)
Average LB listed: 4.20 (247 pounds)
3 cone drill
Chris Long: 7.02 (272 pounds)
Average LB listed: 7.02 (245 pounds)
This group of linebackers Long is going up against in this statistical breakdown are 1st round picks, in large part because they are physical specimens. The fact that Long equals most of their statistical performances despite being 24-27 pounds heavier, is a true testment to his incredible athleticism.
"Said Rams Executive V.P. of Player Personnel Billy Devaney of Virginia DE Chris Long, “I don’t think [pass rushing] is his forte"
Even if that quote is true, it's not really a knock on Chris Long.
http://en.wikipedia.org/wiki/Forte
"Forte, an individual's strongest talent or greatest strength"
If anything, that's fairly high praise. It simply means he does other things as well, or better than what his perceived strength is.
....and you base this on what?
Merriman went from 249 pounds after the season ended to around 272 pounds right before the combine. There were serious concerns about Merriman and steroids before the draft, and you know the rest of the story.
Backtrack much? What would make him a "good/great" 4-3? Answer: His overall athleticism for his size. Hmm, that sounds an awful lot like Merriman.
He spent the majority of his collegiate career as a 3-4 DE, expecting anything more would've been a huge stretch.
I want the BPA, and I feel Chris Long is the BPA. So to answer your question, yes, I would be thrilled if we picked Chris Long with the 1st overall pick.
An OLB with the athleticism of the average 1st round pick (LB), despite being 24-27 pounds heavier than the average 1st round LB, that has the ability to play the run, and get after the QB.