Not a yes or no question.
You could make the case that the 2011 Saints were the best offensive team to ever take a football field. Basically, other than TE play, everything about the 2011 Saints offense is better than the 2013 Saints offense.
Defensively, I think we all know the answer to this. If we had this defense in 2011, we'd have two Super Bowl rings. I'm about 99% confident that this would be the case.
I'll put it like this: if our offensive line builds off the Dallas game, then the answer to this question will be yes in a few weeks. That's the ONLY thing holding this team back from complete dominance of the entire NFL.