Am I the only one who thinks McFadden is more of just an athlete than a great halfback prospect? I'm not positive, but wasn't he a QB in high school?
The learning curve for a RB isn't very high compared to most other positions, but it's still there. When I watch him I see an unpolished RB with incredible physical gifts. I rarely see him wait for his blocking to develop. There have been a few times where if he didn't just rely on his incredible speed and waited for daylight (as opposed to just blazing around) he could have had even more huge runs. He's going to need to be coached up in the pro's before he truly harnesses his ability.
Personally, I think Adrian Peterson (injuries aside) at Darren's level of experience was a better pro prospect because he was so well-rounded.
That said, I think everyone needs to just play wait and see on this. I wouldn't complain if he has another season like he's been having and the 'Boys pick him up... but there are A LOT of things that need to happen for that to go down. He, to me (from what I've seen), looks like one of the most physically gifted backs I've ever seen and has a huge amount of potential, but when you get up to the big boys... potential means squat *insert obligatory reference to 500 running back busts*.
Just my 2 cents...