I don't get why this is downvoted because it's pretty much true. I definitely learned to identify the kind of unproductive enthusiast teams without the talent required to get anything done the blog post lays out from all the "let's make this awesome game" forum endeavors of my youth.
It was probably downvoted because of the inference that this is the only path for "real" hackers and that if you haven't had this experience by age 12, it's over for you. There are many ways to gain product / building-things / startup experience.
