Per screen is a misnomer. The liberals are going to go see F911 wherever it was shown. You get the same audience totals no matter the number of screens. Instead, you create an artificial number that makes F911 seem relevant.
Spidey is creaming F911, and I expect there will be a few more movies that will bury F911 until it gets released as a dvd.
Just like the meanigless "records" claim of "highest gross of a documentary".
If you narrow the definition down, anyone can claim a meaningless record.