FWIW, the HD lossless audio sounds clearer to my ears in the one test I did between HD and DTS 3/2-1 (or whatever it's called). I think I used "Inception" as my test, since it won 2010 Oscar for sound.

edit: nope. Inception only ripped the 3/2/1 DTS track. The King's Speech was a nominated film, but I can't tell the difference between the HD-Lossess and 3/2+1 tracks. They both claim to be DTS Digital by my decoder. I was sure that during a test I noticed a difference, but now I don't, so don't understand this.