How various social internet sites occupy our brains has been a recurring topic on here, and I think he summarizes it all pretty well. These sites are working as intended, but I don’t like that intention, and I don’t like how they work for me, personally.
My own experiences with taking time off have had limited success. I still find myself on Facebook or Tumblr or Instagram (or… or… or…) more than I would like, though I’m interacting with it less and have less expectation of interaction on them (which I think is still a net win, but not as much as I’d like). I’m not sure I’m at the point of going cold-turkey (and what shape that would take — where do I want to spend my time?) like John, but it definitely continues to be on my mind.