All this is speculating, but I believe that if Coach had started the Not-Ready-To-Run-The-Offense-Though-Very-Talented-Quarterback this season, and just let him try to grow into it on the fly, we would have been more like 6-6. People would have been screaming to high heaven about "taking steps backwards". Recruiting would have been damaged. And, most significantly, since Hendrix and Golson will get their full shot to run everything in the spring, nothing will have markedly been gained for next season.
Doing it his way, rather than the way speculated by a certain fraction of the fanbase, Coach has positioned us for another fairly good bowl game exposure, a possible 9 win season, continued good recruiting vibes, and a 2012 year with an athletic QB running the team, if either one can demonstrate competence at doing so. As usual with this man, I think Kelly has brilliantly squeezed what he could out of a mediocre situation not under his control.
I understand that others view it differently. They characterize opinions like the above as Kelly-green optimism. May I say that wishing Andrew in there before he was ready and thinking somehow that things would have been more successful on the total season, is in my view FAR more "romantically optimistic" than the pragmatic approach that Coach took. We are all blowing smoke here. Coach took the path which he felt gave us better chances of a good season now, while [because of sliding Andrew in there] did not damage our prospects next year. That was his judgement. It is arguable, but it was not "crazy" nor based on irrational emotional states nor incompetence.