I'm always skeptical with Olympic announcers. First of all, all of the announcers on NBC are Americans or affiliated with America (like the incomparable Bella Karoli), so they're about as unbiased as Tommy Heinsohn is about the Celtics in a broadcast. Furthermore, while some of these announcers were affiliated with gymnastics, I wonder how much many of these so-called experts really know if they're really only significantly covering the sport every 4 years.
Now, I agree with many of you that it appears that Nastia had the better routine and that the Americans were robbed, but I certainly don't consider myself an expert enough to know, and I don't entirely trust the clowns that NBC is trotting out there.
On a separate note, I love Bella Karoli and Bob Costas together. Bella's completely out of control and Bob has no idea what do with him. Gotta love it.