I'd be curious to learn more about your thinking on this. A few years ago you were heading in the other direction -- i.e., you were talking about how people could or should start companies at younger and younger ages.

pg, May 2005: "The three big powers on the Internet now are Yahoo, Google, and Microsoft. Average age of their founders: 24. So it is pretty well established now that grad students can start successful companies. And if grad students can do it, why not undergrads?"

pg, now: "Someone who can start a successful startup at 19 can do it as well or better at 22."

It seems this logic can be extended to say people should wait even longer. Someone with a few years of experience at 26 should be able to do a better job of starting a company than someone at 22.

So I'm interpreting this as a major change in your thinking. It certainly isn't a crime to change your mind; I'm just curious about how and when it happened.