Remember guys anything can happen in the playoffs and that Regular Season data isn't necessarily relavant when playoffs come around.
The most striking example of this is when the COLTS won the Super Bowl in 2006. The Colts RUSH defense was historically bad.
In the first round of the playoffs they played KC who had Larry Johnson running the rock really well putting up over 1,700 yards (2nd in the league)
yet In that game he rushed 13 times for 32 yards. The Colts were a much better defensive team in the playoffs than anyone could have anticipated.
I also think that QBR rating is a little skewed, because the MIA, DET games where they played poorly. The Bills, AZ, SF games would be sckewed due to backups playing alot as well.