Mostly agree, The Audyssey DEQ is a pretty good implementation of the F-M curve idea.
My only complaint with it (as I mentioned before) is the way they decided to mess with the rear channels level.
AFAIK it has nothing to do with the F-M curve and their reason for doing it I've never found a straight answer on?
IIRC, when asked, Chris K or other spokesperson said that is from their in-house research, which told them that audio sources behind the listener suffer more.