He was encouraging people to pirate the movie in order to see it before the election.
A lot of people either didn't see it or were too ignorant to go see it, like "It's against Bush and I'm afraid it'll change my fragile baseless opinions!" or some shit, so who's to say it didn't have any effect on people?
I think at the core of it all, it made democrats seem more full of bullshit because people thought "Since Moore is a democrat, and we have the opinion that he's stupid and you can clearly see it because he's fat, so all democrats must be stupid!"
Republicans are right to think that Moore's is a campaign of FUD, because along with any education it might be bringing, and any encouragement to look into the facts, it's also creating a lot of loudmouthed idiots. This was to be a good thing, because people would eventually argue with each other until they came up for the truth.
Everything was going according to plan, except for one thing... People are fucking idiots. They don't care about finding the truth, this thing is just a pissing contest to the american people. Nobody's actually treating the facts with the attention they deserve, and it's like 100% rhetoric now.
If campaigning swung the pendulum in one direction, by making everything as Jon Stewart describes as keeping up appearances instead of asking the hard hitting question, the idea of 9/11 was that it swung the pendulum the other way, bringing perspective to the entire thing. If one perspective was distorted reality, another perspective was a facts based approach. If the facts were misrepresented, at least they could only be countered by facts instead of bullshit.
Or so I thought. But I guess that I've overestimated people. And that's fucking depressing, because I have a pretty low opinion of people.