A somewhat different take on the thing we reblogged earlier, but it shows two very interesting things: First, Tumblr and Pinterest are timesucks in equal measure, and second, nobody’s actually hanging around Google+ once they sign up. The latter is the subject of this super-interesting Wall Street Journal piece. (EDIT: A good point: Don’t take that Twitter number at face value, as this graphic skips two key elements of the Twitter experience — mobile and third-party apps.)