rdsoftware:Watched this the last night (TrueHD over PCM from my PS3), and I ended up going into the settings on my yam 763 and changing the dynamic range to 'standard' instead of 'max' as I found if I set the volume at a level where the voices were loud enough, the roof of my house nearly came off during the explosions and other loud bits...
I think this is the nub of the matter, HD audio has a much larger dynamic range than previous formats, ie the difference between the quite bits and the loud bits is greater, and the quiet bits are quieter, so people think that DD "sounds better", what they mean is it sounds louder.
I guess it's the difference between listening to pop and rock or listening to Classical, when that lone violin starts playing you struggle to hear it, so you turn it up and then the whole orchestra kicks in and blows your head off, whereas that doesn't happen with a Metallica cd (because it's ALL recorded at the same volume), so people think it's "louder" and obviously "louder"="better".