The article was advocating for something more back and forth, like a chatroom or forum, rather than a newsfeed.

With Google+ just starting out (even at 10m users), there's already a feeling of exclusivity and community. Groups would definitely help keep that feeling going as Google+ goes public, though, as long as it's implemented right. With public circles, groups, tags, etc being advocated, I hope the simplicity of Google+ isn't lost.