The dialogue was way too smooth

I really get what you're saying, and sometimes I would agree with you - that the overly smoothly written and spoken dialogue kind of ruins my experience of the film.
In 'Easy A' though, I was perfectly happy just going along with the pseudo-reality that the slick dialogue created. It reminded me a lot of ye olde 'What's up, doc?' with Ryan O'Neill and Barbara Streisand. Fast, impossible and most definately improbable dialogue, delivered WAY to smooth, but madly entertaining nonetheless.

I know exactly what you mean. That's why I loved (and still love) "Parenthood" that much. They have scenes in which are 8 or more people around a table and the camera lingers on the 2 or 3 who have a conversation, but everyone else is talking to other people as well. Like a normal conversation in a family should be. The other actors don't just sit there quietly (and awkwardly) and be silent. I love that. A lot of people have said though that they dislike that people are talking at the same time and sometimes you cannot understand every sentence, but that's real life. People won't let you finish a sentence, people will stutter sometimes or a sentence won't make perfect sense. "Parenthood" got a lot of backlash because they portrayed conversations realistically. Usually, movies and tv shows are just toooo smooth!

"Life is like a movie. Only you can't pick your genre."

The dialogue in Easy A is almost too clever for its own good.

It's not, at any point, sold as a documentary or reality tv. When is the last time you saw a movie where people stuttered their way through dialogs and have you been watching too many movies with Channing Tatum lately or something?

For every lie I unlearn I learn something new - Ani Difranco