Google+ may be considered the ugly duckling of social networks by some, but as Google+ statistician Paul Allen explains, the network is growing at an impressive rate. According to his analysis, a quarter of all Google+ users have signed up in the last month alone, with around 625,000 new users joining every day. Allen estimates that the network will pass the 100 million user barrier before the end of February, and that it’s on track to have 400 million users by the end of 2012.
