Since Facebook's CFO admitted in 2013 that young teens were visiting the site slightly less frequently, most marketers have accepted as fact that teens are fleeing the site en masse. But that's simply not true. Forrester's latest US online youth survey shows that Facebook remains by far young users' favorite social network. This report will reveal the surprising data as well as detail how much (or how little) young people are using social services like Instagram, Snapchat, and Tumblr.