In response to agcsbill's comment:
Let me add this to this discussion, one thing Brady has not really talked about, and that is about the defense of the Pats since 2006.
Agree, but I would say it wasn't just the defense that regressed, the offense also went downhill after 2008, they became smaller, more finesse, could beat you in fewer ways, couldn't sustain a small lead by playing keep away or a ball control style of play and had no receivers who could beat you over the top or on the edges.
Overall the team was in need of a huge rebuild, 2007-08' was the last hurrah for the oldschool vets on the team, that's why they went for it all in 07.' I still think in 08' with a healthy Brady they had a shot to win it all, even with Cassel if there hadn't been that early learning curve they could have made noise in the playoffs.
That the team even made the playoffs from 09'-2011 is a testament to Belichick and Brady's greatness along with Vince, McCourty, Mayo, Mankins etc... who covered up huge deficiencies in the depth chart.