This is a stupid argument. Now that the decade is finally over (2010 is the final year of the decade and yesterday's Super Bowl is still considered the 2010 season) I think the Steelers would have a reasonable complaint if they won yesterday. They would have tied the Patriots at 3-3 in Super Bowl Championships - and all I care about is championships so the Patriots get not bonus points for make a 4th Super Bowl and losing it.
IMHO, that would have given us a tie for team of the decade. But Pittsburgh lost. So the final score is:
NE - 3
Pitt - 2
Tampa, Indy, NYG, NO, GB - 1