I haven't gone into the full details, but from what I could tell from the Larry King joint appearance tonight what happened was fairly typical. Basically, to "fact check" Moore, the kind of scrutiny which rarely happens to, say, hacks from AEI or the Preznit of Amurka, Gupta pulled up some nitpickery alternative numbers. One could determine whether Gupta's chosen numbers were more or less correct than Moore's, but nothing supported the idea that Moore "fudged the facts" as was claimed. More than that, the differences weren't relevant to any point Moore was trying to make.
Anyway, I haven't seen SiCKO. I haven't put any time into researching any claims, or counterclaims, in the movie. But what is clear is that "fact checking Moore" means one can throw up something, anything, and use it to cast doubt on his integrity. I welcome fact-checking. I just wish CNN would subject more of their guests to it.