One of the questions I get asked a lot when I give social media training is how many users are on the various social media networks. This infographic from Go-Gulf.com published this last May answers this question. When it comes to sheer numbers, Facebook has all the other networks beat. Its 901 million users – set to hit a billion this summer – far surpass Twitter’s second-place user count of 555 million registered. Twitter also comes in second place after Facebook when it comes to monthly visits, with 182 million. But what’s really shocking is Pinterest – the newest visual network on the block – boasting 104.4 million monthly visits, above Google+ and LinkedIn. And, perhaps even more shocking, Pinterest is tied with Facebook for first place in terms of how long people spend on the site each month. The average social networker spends 405 minutes on both Facebook and Pinterest (and 89 minutes on Twitter).