Why does Warner Bros. refuse to have better audio?

[Zaphod]

I just don't get it. Don't get me wrong, I am glad that WB is still faithful to Blu-ray and all, but why do they refuse to use any of the higher resolution audio codec's? It seems that every movie, if not almost all of them, they are just being lazy in their implementation of lossless audio, or lack thereof. Take for example their newest offering, and most recent theatrical release, Oceans Thirteen. Again no lossless audio and just a basic DD track. I can only hope Harry Potter has some sort of lossless audio, because if it doesn't this will not do the movie any justice. I hope WB figures this out and puts lossless audio on these films before it is too late.

Is there a reason behind all of their madness?

How can these movies be HD with SD sound?