I'm pretty sure the bengals are skewing these results some.
Wouldn't the results be inherently skewed by the small historical period? The best case would be a team that moved in 1993-1994 so they played an even number of years at each location, but can you think of any two teams that changed addresses in a perfectly comparable situation? I'm just trying to deny that beautiful Gilette Stadium won't be as good for the Pats in the face of this season's evidence to the contrary (when the players on a +.500 team with a rabid fan base notice a lack of noise, something's wrong).