I agree completely. I did read what was supposedly the shooting script and only one girl was bitchy and cursing all the time. Not sure what happened during the shoot that made all of the other characters act the same way. There were a few other differences between the script and DVD version as well.
Only one girl was mean and cursed, the ditzy blond in the foursome would repeat things the other girls said (she couldn't think for herself), The Cook was described as heavyset and dark-haired, there was an opening montage with newspaper articles about The Cook escaping from a mental institution, the bathtub scene was a shower scene, the food at the meals was described as much fancier, scenes of The Cook sealing up the house with lumber, Bunny had a couple topless scenes, some scene with Amy and Bunny calling 911 but getting cut off, a drunk wrestling scene between two of the girls, a few of the death scenes were more gruesome and two girls fought back more and The Cook was injured (stabbed and bitten I think) in at least two of them, and I think the classic cat jumping from behind a curtain scare moment was in there.
oh, of course the cat's gonna be there. that's pretty cool though, where'd you get to read this, if you don't mind my asking? (not to say I don't believe you, just interested)