Who cares if 'people really talk like that'...?
That's a complaint that has popped up in Juno criticism and now Youth In Revolt: "Nobody talks like that."
What is the issue if a bunch of quirky FICTIONAL characters talk differently than the audience's boring bunch of generic friends? There is a reason we go to movies, and that is to see things that are more interesting or more emotionally engaging than our boring lives.
Do cops really act like Murtaugh and Riggs from Lethal Weapon? Does anyone actually know anybody that acts like "Jack" from Fight Club? Or Verbal Kint from Usual Suspects? How many times has an actual person had to deal with situations similar to those experience by John McClane or John Connor? How many gangsters does anyone actually know?
Why is it that occupations and events are allowed to be extraordinary, but dialogue isn't?