anyone know if it really is fake?

there is an episode in the extras section of the dvd which is basically the sanchez team saying they arent really mates, they didnt know each other before the show, all stunts were set up and heavily supervised all made up by the writers (whereas the show makes it seem like the group of mates just carry out inpromptu pranks/stunts).

i liked DS, when i saw this on the dvd it put me off. but i wasnt sure whether it was true, why would they put something like this on their own dvd? part of me thought it was just a spoof, given that its on their own 'extras dvd section', taking the piss pretending they are fake (in response to criticism they've received).
but since MTV have recently been revealed for faking most their other shows - bully beatdown, the hills, laguna beach etc, is dirty sanchez the same?

anyone know ?