I liked this post quite a bit, but I think that essentially what he's complaining about is that bloggers write from their own perspective. That's the whole point of blogs, isn't it? They're one person's voice?
He is also warning that their perspective can be misleading. Like saying that Stack Overflow participants are the best developers on the planet, for example.
excellent post, thanks for sharing... what the post fails to zero in on (at least state directly) is that all of these people are simply marketing. is all marketing bullshit? i dunno, but that's what these guys are all doing...