The 400K pageviews he is referring to were for "Feynman Lectures on Physics", which was a PDF, which had zero backlinks and wasn't mentioned anywhere. You are

The 400K pageviews he is referring to were for "Feynman Lectures on Physics", which was a PDF, which had zero backlinks and wasn't mentioned anywhere. You are of course correct about QDF. The first half of his post is indeed relevant to that, but the major point is further down.