Excellent insight and to get there before you are 20 is impressive in its own right. My eldest daughter wanted to be "grown up" from the time she was like 4, now that she is commented "being grown up isn't as fun as I'd hoped, they make you pay bills and stuff." :-) You can say what you want about Mark Zuckerberg but the man is passionate about what he wants Facebook to be, and has been for a long time. I attribute his success more to that passion, and executing on it, than any particular talent or skill.
Thanks! I agree he's done some awesome stuff for his age.