There's many reviews and they have a generally appreciative response: (http://news.google.com/news/search?aq=f&pz=1&cf=all&ned=us&hl=en&q=people+vs+george)

The AICN (and related) view it as somewhat boring (or 5 years too late as they put it) because they've grown up with these issues and are familiar on an intimate level. (these tend to be the Hollywood insider type blogs) Then there are the majority of the reviews (and blog responses) where they cater towards the people who just want to release some bile. Unfortunately in some of the interviews the director gets caught in this mentality and looses his balanced stance. And in the last few days there's been 2 or three reviews which move beyond the doc. to explain how societies interaction with culture is changing.