I kind of like this pick, even though it seems like a reach at this position.
What really stands out to me is the way he modulates his speed. He doesn't have three gears like most running backs (Full throttle, stop, slow to pick your way through the traffic). It's more like he has a continuous variable transmission plus afterburners. It looks like it will be hard for defenders to judge what angle to take to bring him down. Like Percy Harvin, but with patience and with more control of that top end. I can see him frustrating defenses like Lynch did, only with different technique. Instead of looking to get into, then evade, a scrum, or just carry the scrum 15 yards, it looks like he will be avoiding them entirely. (although he did go a little Beast Mode against Georgia Tech)
Very upright running style with good downfield vision. Always looking for where the lanes are opening up and where the blocks are coming from. Good patience to let the blocks develop. Decent though not great blocker. Footwork is almost the complete opposite of Lynch. He doesn't plant to cut.
I do worry about his narrow stance. He runs like a receiver and really reminds me of Golden Tate. Maybe it is just the contrast to that wide, low base that Lynch had, but this guy just looks like he runs narrow and tall. Seems like he will need some wider holes because it seems he would be easy to tip off balance.
I also worry about how he will fit into Cable's scheme. Lynch and even Rawls had great success with hitting the hole that was supposed to be there, and trusting it would open by the time they got there. To me it looks like Prosise wants to see the hole before he hits it. That won't work in the NFL
Runs the jet sweep with about the same success as Harvin.

ukeface:
That being said, I get the feeling that Cable and Carrol feel that this is the year that our line (with the help of our passing game) finally comes into its own and starts producing producing actual holes to run through. We saw it at the end of last season when Rawls had actual lanes to run through, and Lynch's ability to break through a line with no gaps became less of a necessity.
While he has a definite propensity for one hand, I did see him carry in both in college, although I can't say I ever saw him switch hands mid-run.