I think this guy completely missed the point. He mixes distractions from real research work. "Being informed" is a vague phrase. Sometimes information consumption is like eating junk food - it can be too much. In case of author, it feels like a solid case. Unless he uses social networks for real work - I cannot see how reading Facebook can be productive or relevant to work.

In the end, this article felt like self defence, or even more like rationalization on the topic. But I must admit that it forced me to think about this topic a little.