from grey's season premiere

Dr. Callie Torres (a.k.a. the one who looks like a drag queen):

It's the doctor thing. 4 years of high school, 4 years of college, 4 yrs of med school... by the time we graduate we're in our late twenties and all we know how to do is sit in a classroom and study science. Time stops. We're socially retarded. Meredith? She's 17 years old. I'm 17 years old. This is high school with scalpels.

Truer words have never been spoken. This really is high school. With the addition of:
1) being of legal drinking age
--> i.e. alcohol is a very necessary social crutch
2) living on our own
--> i.e. no authority figures to protect us from ourselves
3) much much more gossip
--> i.e. no time to meet anyone outside of med school, tensions build, and the intraclass drama web is prob larger than anyone lets on

Of all the things Grey's does unrealistically (hey I still love it), they really hit this nail on the head.