Anyway, I think the greater argument isn't, "Drop out of college and become Bill Gates." It's "College tuition prices have gotten so out of hand that it might no longer be worth what you pay for."
Going to a private 4 year can easily cost you more than 100k. With 100k and the right motivation, you can start any number of businesses and teach yourself more about entrepreneurship than you could have in a 4 year business program and you have the chance of it making you money instead of just being a purchase.