(veep) DAN
I've never got the impression that it's a documentary though Bigelow/Boal are certainly playing up the fact that a lot of their intel was gleaned from good sources.

The thing is when you watch the film the fact that they use real names, real places, and real events makes you THINK it's real, whether consciously or not. And then it's difficult to separate what actually happened from what's been exaggerated for creative license.