Google passed Twitter to become number two (and three -- via YouTube) on the social networking charts, for the first time, according to Global Web Index. As Global Web Index writes:
Google+, who despite being branded a failure or ghost town by large portions of the media, grew in terms of active usage by 27% to 343m users to become the number 2 social platform. Interestingly for Google, YouTube (not previously tracked by us as a social platform) comes in at number 3, demonstrating the immense opportunity of linking Google’s services through the G+ social layer. This is also a key indication of why Google+ integrated with the Google product set is so key to the future of search and the internet. We’ve got more coming on Google+ later this week as well.
Internet Evolution's Mitch Wagner, a long-time Google+ user and fan, put it more succinctly: "Neener, neener, haters."