Another bit of history that might actually be on the Bills' side, the 84 49ers went 15-1 and won the SuperBowl. Their only loss during the season: at home to the Steelers. Also, both times the Ravens won the SuperBowl, they lost at home to the Steelers earlier those seasons.
In conclusion, maybe some teams just need a home lost the the Steelers before kicking it into gear and winning it all.