2007 Patriots: 411.2
2009 Saints: 427.3
That last one's not an NFL record, but you get the point -- these Saints are right there with the Patriots. And they've done it having already played three Top 10 defenses -- the Jets, Giants and Eagles.
Another thing New Orleans has going for it: environment. Where the 2007 Patriots slowed down later in the year, with the tougher defenses (Ravens, Eagles, Giants) on the slate down the stretch and the weather worsening, these Saints still have the Rams and Bucs (twice) and Redskins on the slate, and play their home games in a dome.
All of this should be an interesting subplot when the Patriots hit New Orleans Nov. 30.