Amazingly ironic that he uses StackOverflow's (very basic, lame and restrictive and, yes, I have several Ks rep there) commenting system in a blog post title "Web discussions" when, years after years, they kept repeating:

"StackOverflow is not a place to get interesting discussions because StackOverfow is not a place to get discussions at all"

It's not very honest to use SO as an example of a good way to do "discussions" correctly.