If he can maul people during blocking, while also showing excellent hands, route running, and yards after the catch, I'm perfectly fine with "settling" for the comparison to Irv Smith. He was already 250 lbs in college, and if it weren't for another 1st rounder playing in front of him (Derek Brown), he would have been a multiple year starter.
I still get chills when I watch the Indiana University game, where he dragged the entire secondary with him into the end zone. Of course, Tony Smith did give him a helping hand for the last few yards...