Good question. It will depend on two things: 1. How hard will he work on the things he knows he has to between now and October? 2. Will he be able to earn the respect of his teammates in a small amount of time, so he feels confident enough to impart his talents and skills and impose his will?
Both of those things can be said for all incoming freshmen; however, it's exaggerated and emphasized for someone with elite talent. In my opinion, that's what made Durant such a star in Austin - he recognized both and made a concerted effort in both areas. Not easy for most.
That said, I know he's down here working awfully hard right now, so that says a lot for number 1. As for number 2, he does have a little bit of that dominant alpha male mentality that's necessary to come in as a freshman and dominate like Durant, John Wall, or Michael Beasley.
Not sure he has enough of that at 18 years old; but, with the lack of a star on this team, it won't surprise me if he doesn't average high teens in points, close to 10 rebounds (a large number of those will be offensive), and a couple of steals.