In response to prolate0spheroid's comment:
But in 2007 they passed 57% of the time and ran 43%. That's less balanced actually than they were last year or in 2010 and only slightly more balanced than 2011.
In 2007, in a typical game they would have passed 37 times and ran 28 times. In 2011, in a typical game, they passed 38 times and ran 27 times. The increased balance amounts to one play per game switching from a pass to a run.
Again, I don't know how many times I can repeat myself, in 2007 the Pats ranked 9th in rushing attempts, they were 5th in rushing TD's in the entire NFL... giving percentages is nonsense because the dynamic of the league changes every season with new rules and increased offense.
Judging teams against their peers is the only way to truly measure balance or anything else for that matter.
Also the Patriot offense has been more talented than just about every other team in the NFL at positions that matter most; QB and offensive line. Many other teams have fabulous running backs, wide receivers etc... but without the O Line in front, nothing else matters.