I tried changing the distance on my sub setting from 0 feet all the way up to the max my receiver allows (28 feet I think) about a month ago. My ears could not hear a difference. I know I listened very critically but I will try this again when I get some time. By the way, according to my audiologist, within the limits of her equipment, my ears are "mutant-like" .

I definitely do hear a big difference when I adjust the delays on my surrounds though.

Any thoughts on why I don't hear a difference with different sub delay settings?