I don't know why you feel the need to hate on his success because he doesn't have any employees. It's as if whatever he built counts for nothing. Whatever you did while you were a sophomore in college it probably wasn't anything close to what Dan has achieved. From his blog: "a little app I built in a few days to review websites that's grossed a few thousand dollars to date" and "I programmed and sold apps for BlackBerry and iPhone including the first BlackBerry anti-theft program called FindIt". So yeah, he's made money.
I know I was still finding my way in college at that point, cruising by in my classes without much to show for it.