My only guess is maybe the studios don't want to kill people's sub-standard subs (I doubt that), although I really didn't feel there was a lack of bass in this one. As mentioned in that thread, while they may filter out the lowest of the lows, there's plenty of sound in the range where most systems are fully capable. I saw they mentioned a lack of bass in Pacific Rim also, which I again, did not find myself either. IMO, they're over analyzing this aspect when these are just popcorn flicks that should be enjoyed.