My ears are still subtly ringing from last night's showing, even though I set it to the level I typically do (about -12 MV). I think it runs hotter than other titles, and the upper LFE particularly in some scenes. The LFE should please bass heads.
I had particular guests that haven't been over in quite a while, and so I let them have front 'n center. One of them believes that this title should garner awards for best soundtrack. They were extremely impressed.
IMO, I think the best soundtrack I've heard recently in terms of quality might be Toy Story 3, and think it is superior to Inception, and for some particular scenes, easily IMO. Not that Inception wasn't fun. I only recently learned that TS3 was the first time, ever, that 7.1 was used in a commercial theater. Yes, we the consumers have enjoyed discrete 7.1 for about 4 years now, before the theaters ever had them (I am not including Iosono enabled theaters in the discussion!).
I thought the PQ was fine, and was greatly relieved to see that it was at least significantly better than The Dark Knight (excluding IMAX scenes). Not demo material to me, but good enough IMO.