Like most critics of Twitter (Twitics? No. Definitely no), he's completely missed the point.

He seems to be expecting Twitter to be a drop-in replacement for his blog, but it serves an entirely different need -- at least, I suppose, when you have real-world friends on Twitter. Being able to broadcast messages to your friends is pretty powerful. My standard example use-case is "I'm going for lunch at X in 10 minutes. Anyone nearby?". Try that with a blog.