Yup... if I knew then what I knew now (a moot point, admittedly), I'd audit classes or do the cheapest possible thing to be associated with the university without paying for it, and simultaneously work on startups/projects.
I wouldn't say it is the classes though. College transformed me as a person and forced me to grow up. Maybe it helps that I go to Drexel where we have co-op (school for 6 months, work for 6 months, repeat). Anyway, I would not have been prepared to lead a start up right out of high school. Today, I think I'm ready.
Sure... I meant participate in a startup/project, not lead it right away.