How can one comment on something that hasn't been released, or even been completely edited yet. When one admits that he hasn't seen the film in question, it's a bit ridiculous to comment on it.
And then, one wonders, where were these same objections when Michael Moore released his prevaricating monstrosity? Or, when a movie is released as a "How to" assassinate our President. Or... or... or...
Let's assume that something of this nature cannot be completely factual since many of the principals would be inclined to either a) not tell the truth or b) stretch the truth in order to make themselves appear in the best light.
This is where the term docudrama comes in; in fact, why it was invented.