This isn't really new. He's always been a bit fuzzy on technologies; neither RSS nor XML-RPC really show a deep understanding of XML, the scripting environment which I became deeply familiar with in college was always a bit weird about some of the fundamentals, etc. On the other hand, his resume blows mine away; his list of truly independent inventions may not be very long but the list of technologies that he is basically the reason they are popular is. I have found it more educational to think about why that is than to be dismissive because he doesn't always have a precise understanding of everything. Who does, after all? He's got a lot of GetItDoneness, even if his technical skills aren't always the absolute best.