I thought the tech stuff was pretty realistic (although I refuse to believe Facebook was written inside of emacs).

Also I felt the whole "I scored 1600 on my SATs" and shooting down his professor with some technobabble about memory management was a little much. I understand there needs to be elements to add dramatic effect, but I can't help but feel there's a whole generation of assholes out there taking notes and thinking that being arrogant all the time = being right all the time