For one, I don't really feel like the expletive in the title helped his cause at all. A better title would have been "Facebook suggests groupings of your friends for you!"
I also thought his example was contrived. I mean, is there anyone who's so worried about their social networks that they will hem and haw over whether someone is a coworker or drinking buddy or whatever? And if there is someone like that, well thank goodness Google+ supports their neuroses!