pewinternet:  The Landscape of Social Media Users — As of December 2012: 15% of online adults say they use Pinterest 13% of online adults say they use Instagram 6% of online adults say they use Tumblr 67% of online adults say they use Facebook 16% of online adults say they use Twitter New report out today with a detailed breakdown of social media user demographics, by individual platform: http://pewrsr.ch/XORHnZ Happy Valentine's Day from all of us here at Pew Internet.  Interesting racial disparities..