I think Paul was spot on about a giant claw ripping these startups into shreds somewhere along the way. By intensifying the hub effect, YC circumvents the claw.
I beta-tested the different bundles Eric was planning for the launch of the books - buy X number of books and get Y, etc. I'm surprised that there wasn't a massive Twitter assault, though. These tweets would have generated even more buzz than the book already has. I'm enjoying the read!