One of the big problems I have with PG's essays is that, though I like the content, I have a very hard time believing everything he says without evidence. When you are in an emotional low, it's very difficult to think, "I should just persist because PG says it usually works." So it was great to see his points actually backed up by other founders' experiences.
As a side note, does anyone have a transcript of Jason Fried's talk? His was another favorite of mine from yesterday.