There's still parity in the NFL. It's near the end of the rankings and in the middle class. At the top though? It's four great teams and then everyone else.
The best team doesn't always win the Super Bowl. Many fans hate hearing that. They want to feel like the Super Bowl provided a definite answer on who was the best team, and the notion that the champion and the best team aren't one in the same bothers them. But that's never guaranteed in a single-game elimination tournament. All you need to win is a playoff berth and have a hot month. So the champion isn't guaranteed to come from the Patriots, Broncos, Seahawks or 49ers. But there's a big divide right now between Nos. 4 and 5.
