I love B-Cain but teams game plan for and double team those guys you compared him with.
Probably a valid point. That doesnt change the fact that TBC produced at a very similar level.
I imagine that to answer that question you would either have to review all of the tape, and/or look at the production of the players alongside them.
I do think though that you are overlooking something.
Teams gameplan for every team and double team against every team. (I actually have rarely ever seen a true double team its actually help) My best pass rusher will get gameplanned for as my best pass rusher, even of your best is twice as good, with the exception of whether the guy on the other side is effective. For example the gap between TBC and our 2nd best pass rusher is larger than the one between Freeney and Mathis, so TBC would get the majority of attention, while Freeney and Mathis split it.
But to round out the point the Patriots had a combined 31 sacks.
Carolina had 31 as well, so that would seem to downplay the argument that Peppers getting gameplanned for and double teamed cut down his production, because it didnt help his teammates do any more than TBCs teammates.
Indy had 34, so again, doesn't look like there was extra production created by the focus on Freeney (and i think its fair to say all else equal Mathis is 3 sacks better than Burgess or Afailius or whoever)
Minnesota had 48 and led the league, so attention on Allen could be valid, while talent of other players may explain it too.