Parity in the NFL?

What happened to there being parity in the NFL?
There seem to be three tiers of teams in the NFL this year: the good ones, the bad ones and the ones that lose to the good ones and beat the bad ones.
Through five weeks there are 5 undefeated teams and 5 more that only have one loss*. There are also 4 winless teams and 4 more with only one win*.
Pairing a "good" team with a "bad" team can make for bad football. Several games from this Sunday fell into this category: the NY Giants versus Oakland Raiders (44-7), the Minnesota Vikings versus the St. Louis Rams (38-10), the Philadelphia Eagles versus the Tampa Bay Buccaneers (33-14) and the Indianapolis Colts versus the Tennessee Titans (31-9). Also, pairing up two of the "bad" teams can make for bad football; see the Cleveland Browns versus the Buffalo Bills (6-3).
Now, don't get me wrong, there have been some good games this year. Just this week two games went into overtime. My observation, though, is that there seem to be a lot more of the "bad" games than in the past few years?
What's your take on the NFL season, thus far?
* The NY Jets, a one loss team, play the Miami Dolphins, a one win team, on Monday night.


