Agreed, the 2001 Patriots were very poor statistically, but that doesn't mean that there's no reason to concern or discuss it. Although, the 2003 and 2004 Patriots were elite defensively.
This I disagree with, because the Patriots were by far the best team in 2007, but towards the end of the season, they had a significant tail-off statistically.
At their peak, they were the top ranked offensive and defensive team in the NFL. At one point, they seemed to put up 450 yards of total offense in every game, Brady was on pace to throw like 60 TDs and pass for over 5,000 yards, and complete 80% of his passes. They tailed off statistically near the end of the season, and every week they looked more vulnerable.
The Chargers have also been a huge exception in the opposite way. And I don't think that the Pats will ever make the top 20 even in defense this year, they were very lousy for the past three weeks. While the offense may find a rhythm, I doubt they see nearly as much success as they did with Moss.
I agree with this for the most part, though.