This is not in your face. I'm serious. What about him makes you surmise he's going to be a great college QB and top NFL QB?
Nothing I see about him tells me of potential greatness. I'm not a scout, for sure. But, you don't have to be to see that he doesn't have great accuracy. Doesn't seem to have the best judgment. Seems to process pretty slow. Good but not great arm. Good size, good running ability, but hardly one of the best.
I can't find one great thing. So, all I'm saying is, yeah, maybe someday he will be great. But if his name wasn't Manning, I wonder what else gives confidence that greatness is his future but isn't in others who seem to have better skill sets and attributes than he does, and proves it in games?