US Mobile Social Users, 2010-2014 [CHART]
By the end of this year, nearly 82 million US mobile users will use a social networking site on their phone at least monthly, or more than a quarter of the total US population. The vast majority of these users (95.5%) will be checking social sites on a smartphone, and smartphone users are about twice as likely as overall mobile phone users to do so this year. By 2014, eMarketer estimates, nearly half of the total US mobile population will be mobile social networkers. Read the rest at eMarketer.