I think that he's no more qualified to evaluate whether this team has "it" than anyone here. In fact, I'd argue that many people here are better qualified to discuss the Bills than he is.
If he was a Bill last year, I wouldn't question his credibility. But his playing 8 years ago (or however long ago it was) in Cleveland has no relevance in assessing the '05 Bills.
Note that I'm not saying he's right or wrong. Nor am i saying that he and Greenie don't have an entertaining show. It's just that I'm not so sure he knows more about the Bills than three-quarters of TSW posters.
Last season many media pundits (and fans) were quick to write them off. There's a lot of football to play. Stranger things have happened, and as last season should have proven, anything can happen.
Personally, I'm going to enjoy football season by taking as it comes - one game at a time, win or lose. I'll let the "experts" worry about the rest of that crap. Afterall, teams that have "it" get it by winning one game at a time. I'm not making any promises one way or the other, I'm just hoping they come out and play hard on Sunday.