Slate has an interesting video from MediaCurves.com that tracks the real-time opinions of people watching the trailer to SICKO. The group is broken down into democrats, republicans and independents. While there are some differences in opinion, all three groups seemed to shy away from the Guantanamo Bay scenes from the movie:
MediaCurves has other videos like this on their site covering many issues. And it looks like you can sign up to be a panelist if you’re into that sort of thing.