It's all annecdotal of course but there's an interesting article on Football Outsiders about bad defenses that turned good in the playoffs. In all 5 of the teams they they looked at (teams that allowed over 20 in the regular season but less than 10 for two games in the playoffs) in the third game the defenses "reverted to form". As I said it's no kind of proof of what will happen Sunday, but it make the picture less clear since previous "flipped swith" turn around only lasted two games.
They've had it with the local and national press calling them the worst. They're out for blood I tell ya.