IMO, the offseason deflects perspective away from how the NFL has evolved, and that accounts for speed so absurdly overrated at wide receiver and similarly underrated at running back.
At wide receiver everyone prefers to envision a gazelle flashing into space and catching a long touchdown bomb. Yeah, that's the NFL I grew up with, when passes were sparse and you had to make the most of them. That was the Bob Hayes, Don Maynard, Cliff Branch, Isaac Curtis NFL. Obviously the Dolphins later had a stretch with Duper.
Nowadays with high volume pass attempts that position is used to moved the chains. It has become a position of fighting for territory, fighting for the ball, and maintaining just the proper blend of composure and athletic arrogance throughout. That's why the position has become so difficult to evaluate, with so many first round busts. It is amazing when you look at catch and production numbers how slow that top group is as a block. Not slow but between 4.5 and 4.6. Few exceptions in recent years. I've seen it posted elsewhere. Those 40 times aren't anywhere close to what conventional wisdom -- or scouts -- seem to prefer at wide receiver.
Running back is completely the opposite. During the offseason fans and scouts seem to want the traditional back who can instinctively deke and slide and pound while dependably gaining the 3-6 vital yards, plus catching the occasional swing pass. Again, that was the old NFL, the one I cherished. I can see how the separation is difficult these days because many college teams do still operate that way. The examples in the NFL are so few it's become mostly meaningless. Seattle tries to do it that way. Yes, the Titans had a big season. None of it seems to translate dependably from season to season. There aren't many Frank Gores out there.
Running back in the NFL has become a position in which you need the occasional running play to resemble a pass play, a guy who bursts clear and gains big yardage. There's all the difference in the world between that guy quick enough to elude the final box tackler 3 yards beyond the line of scrimmage, and the one without burst who succumbs to the typical ankle tackle. It's one of the reasons I eventually realized Kenyan Drake was not overrated, and I did not want to get rid of him. That was a poor move, IMO. Drake was overrated and limited only by template of the old NFL. He's never going to be a workhorse. But he fits the modern game perfectly, other than pass protection.
In looking back year after year recently it's remarkable that 40 yard dash speed is the defining characteristic at running back. Nothing forecasts potential to dramatically exceed college production or draft slotting than that category. I'll go back to let's say top 25 in yards per carry of a given year. The majority will be below 4.5, with some at 4.5 to 4.6 and then a handful above 4.6. Yes it is possible to overcome 4.6 speed but you need to be incredibly special to do so. I don't understand the preoccupation with that focus as opposed to understanding that somewhere out there a 4.4 guy is far beyond what you think he is.