Ryan Leaf used to wear his hat backwards. He got a 27 on the wonderlic. Peyton Manning got a 28 on the test and he never wore his hat backwards.
If you watch him interviewed, I think you will find it has nothing to do with race. He talks like Randy Moss. There is definately some country twang in there. It's his mannerisms and the way he carries himself.
Maybe none of this will matter but, there are definately flags and reminders of past players in my opinion.