I got my first job at 18 as a developer, I never went to college and it hasn't done me any harm.

Granted, I don't know much about compiler design and the like -- but all of that would be theoretic for me in web development. Instead everything I know is more practically orientated - real skills directly related to web development etc.

Whenever I've needed to learn something, a few days reading has quickly groked most stuff for me.