I was under the impression that the design was indeed never tested, but at least the author had some real life experience of building a moderately sized chat service.

I can understand why people like you are pissed by this kind of blog post which reads a bit too much like an ad, but i think it's still good that people are trying to reinvent the wheel with completely new technologies, because sometimes it leads to surprising results.

Maybe the OP should add some warnings in the blog, saying that it's an highly experimental design that people shouldn't try to use for their own projects at the moment...