I think that scheme that game got a bit overrated by what the steelers offense did that game, held the ball for about 40 minutes and Rapethlisburger went something like 40 for 50 and they were something like 11 for 15 on 3rd down.
IIRC steelers had 5 drives of 10-15 plays that lasted 6-7 minutes and they scored points on all of them. Only drives they didn't hold the ball for that long were when the Pats had a pick, a drive in the 4th quarter which they were in FG range but missed and a drive they were trying to run down past the 2 minute warning, first and only time they punted in that game was with 0:28 left in the 4th
That 2011 defense sucked.