Two things:
Attitude is no great predictor, unfortunately. Otherwise Fitzpatrick would be in the Hall of Fame, and Rapistburger would have flamed out.
This thread will be interesting to pull back up if Geno ends up being the real deal and EJ ends up being the second coming of Trent Edwards (not saying that's going to happen, I truly don't know), and everyone will be screaming about how they KNEW Geno would be great and EJ would suck.