As a 20 year old University student, i'm somewhat of an enigma. Sober nearly 2 weeks, but almost 1 month if you discount one minor relapse. Compared to what I was drinking, i'm on fine form.
I definitely think it can be harder for us younger ones. Especially in britain, we have a culture which revolves around drinking. Every time my friends socialise involves alcohol. I once suggested going Ice Skating and almost got laughed out the house!
I live in a flat in which the neighbours seem to be 'on the lash' every night, coming home at 4am etc waking everyone up. As a student, it's very hard to stay away from the booze. As i've said, I think young culture today, especially in Britain, revolves around trying to get as pissed as possible, and congratulating oneself on the resulting drunken acts.