I agree with those who say that next season will probably reveal exactly what we have with Fitz.
At 28 and with 5+ years of pro experience he may very well be coming into his own. Chan is an offensive minded coach who has success with QBs. Having seen the result of his work in Canada for years, I also think Cortez was a great, though quiet, hire for the Bills. He is an outstanding QB coach. Marc Trestman, the Montreal HC, who also has a history and reputation for grooming QBs, including NFL QBs, has called him the best in that department north of the border.
If these guys can help Fitz improve his technique he has the brains, leadership and attitude to be a legit NFL starter. The stakes are pretty high for the Bills but more so for RF himself. If he goes on a tear next year with so many teams needing a QB he is likely to be a hot commodity in free agency for the 2012 season.