I have said this before, first let me say that I have coached football for 10 years now so I have been around a lot of football players and sent a handful to D1 schools, two that play for the Skers right now.
Gabbert has all the tools but the kid just doesnt have "it" he is just not a winner, I would venture to guess that he did not win to much in high school either and I would guess people made excuses for him like "he played on a crappy team" and stuff like that. Some kids have all the tools and look the part and get great stats but they just dont get the wins. I can't explain it any better then that.
Please dont think I am trying to come off as some know-it-all bad guy, its just what I have seen from my coaching experience.