From the preview:
"Our time with Battlefield: Bad Company was short and sweet but it's good to see that things are moving, if not a bit slower than I would like, in the right direction. Every time I see BF:BC it looks just a little better in every area, less the sound. I'm not exactly sure how that part of the game could be any better than it is. When Bad Company drops later this year be sure to crank the 5.1 system and strap yourself in for one of the best sounding battles on any system."