I've seen on several sports sites today where the writers/bloggers are making a big deal about Peyton Manning not shaking hands with any of the Saints players when the game was over.
If I was in that situation, I wouldn't shake hands either. Not out of spite or disrespect, but more out of respect that they're beginning their celebration. I almost bet Manning calls Sean Payton, Drew Brees, etc. some time this week to say congratuations. That's what I would do. Let them enjoy their moment. Just my $0.02.