The cinemascore isn't a rolling poll though. These audience scores about the only thing people really have to them. All I've ever seen cinemascore actually used for is studios and box office analysts to project a movies legs, not some sort of measure of a movies quality like it's a critical rating. So you may get a random sample of a huge movie that Cinemascore measures opening night with a big movie and the most dedicated fans showing up, but are you getting weekday numbers? second weekend viewers? third weekend?

So I don't think they're useless at all. And I think those numbers would be interesting to see for movies because much like political candidates, opinions aren't static.