It's certainly possible but that's the problem in judging college RB's it's so hard to separate them from the OL. Last year I was defending JJ against the anybody could run behind Cal's OL comments, and after 1 year it sure looks like I was wrong(I still think he'll be good). This year Lynch and Forsett went nuts behind that OL and the OL wasn't even healthy all year like it was in 04 when JJ got 2000.
USC has a terrific OL, all 5 kids will play in the NFL, conceivably all 5 kids will start at some point in their careers. There's no question the OL was markedly better this year it shows clearly as both Bush and White's YPC jumped significantly this year. Bush from 6.4 to 8.7, White from 5.4 to 6.6. Some of Bush' jump is his new offseason workouts, but some is clearly the OL got better.
I personally think White is going to be a very good player. The thing I like about White is for a "power" RB, he is not a guy that takes a ton of huge hits. He'll get hit no question, he likes contact, but he's not like Michael Bush who runs so upright and seems to get blasted regularly. Those are the guys who tend to have short careers.
Dayne is a fair comparison, great college career, not much in the NFL(not as bad as people think), but personally I think White has much better feet than Dayne ever did. Dayne was always a one cut and go RB, perfect for the Broncos, White can do that, but he can also make people miss if he has to.
We'll see at the workouts. The one thing that really has me excited about White is the more I read, the more I hear teammates and coaches saying people are going to be surprised what a good receiver he is, he was always out and Bush in on passing downs because Bush is such a threat, but White is apparently a MUCH better receiver than most realize. He's not a great blitz pickup guy but that's true with all rookie RB's and at least he's big enough to do it.
My biggest fear is he'll have a great workout and move up higher than 10th, I'm almost hoping he has a slow 40 or something.