I like Gray's instincts and vision. He showed an ability to not just follow blocks but to set them up. A good cutback runner is usually going to make some cuts that you wouldn't think show great "daylight" skills but he makes them because he's cutting against the grain, going the opposite direction of the flow of the defenders. He does that on many of the carries in the film and after he does it you realize wow, yeah that was the perfect way to take that play.
He has a "will" factor I find interesting. That Pittsburgh run showed it. After doing as much as he did on the play making several cuts, absorbing contact and then re-accelerating, it's hard to get back up to top speed. The guys that were chasing him probably should have been faster. He just straight up willed himself into speed that he probably shouldn't have had a right to (I doubt he's really a 4.4 guy to be honest). And he high stepped it because he knew the defender behind him was going to be diving at his ankles. He just had this attitude that said, I'm not going to be prevented from getting this touchdown. It's mine. He shows that same attitude on several goal line carries throughout the footage, and that's one reason he converted an amazing 75% of his carries inside the 10 yard line into touchdowns. I've been tracking that stat for a while now across college and pro. That's one of the best I've seen considering the sample pool.
I look at his tape and think about the fact that in Week 1 of the 2013 season it will have been 22 months since he originally tore his ACL and so he should be perfectly healthy, and I ask myself...where would he rank in this year's RB class? Just go off the tape and compare it with other guys in this class. Where would he rate? To me, it's like getting a whack at Christine Michael but without the well-demonstrated character issues that Michael possesses.