The author of this article, Kerry J. Byrne, goes on to explain...
The performance of New England’s opponents, its 74.6 Defensive Passer Rating, leaps screaming off the list. It’s a gauntlet far tougher than that which any other team in football has faced this year. In fact, it’s not even close.
The league-wide Defensive Passer Rating in the NFL this year is 83.7 — which means the average defense surrenders (and the average quarterback produces) an 83.7 passer rating.
Most of the game’s elite quarterbacks have faced defenses in that range. In fact, as you might expect from teams that face the game’s best quarterbacks, their opponents trend slightly below average, from the 82.6 that Eli Manning and the Giants have faced, to the cushy 89.6 defensive passer rating of Green Bay’s opponents.
Bottom line: given the cushy schedule faced by the likes of Peyton Manning or Kurt Warner, Brady’s numbers would be much, much better than they are already.
What's most comforting about this article is the reminder that assuming the Pats make it into the playoffs, their likelihood of playing a top 5 passing defense again (minus maybe the Ravens) is nil until the Superbowl where they could face a rematch vs. the Saints.