Parity in the NFL

As we prepare for the NFL's Conference Championship games, it's worth noting that Pittsburgh is the only #1 or #2 seed remaining in the Playoffs, as the Eagles beat the #1 Giants, the Cardinals beat the #2 Panthers, and the Ravens beat the #1 Titans. When you get down to the Divisional round, I wonder if there's just so much parity in the NFL that momentum for the winning team from the Wild Card round cancels out or even supercedes any home field advantage/rest/extra planning that the #1 or #2 seeds might have? I accept Pittsburgh from this analysis given the conditions, their #1 Defense, and the fact that the Chargers are a warm weather team. Regardless of whether I'm right, I think the Championship games are gonna be awesome.