Over 70m Americans accessed social sites or blogs via mobile in August 2011

"comScore, Inc, a leader in measuring the digital world, today released results of a study on mobile social media usage based on data from its comScore MobiLens service, which showed that 72.2 million Americans accessed social networking sites or blogs on their mobile device in August 2011, an increase of 37 percent in the past year. The study also provided new insights into how mobile users interact with social media, finding that more than half read a post from an organization, brand or event while on their mobile device.
“Social media is one of the most popular and fastest growing mobile activities, reaching nearly one third of all U.S. mobile users,” said Mark Donovan, comScore senior vice president for mobile. “This behavior is even more prevalent among smartphone owners with three in five accessing social media each month, highlighting the importance of apps and the enhanced functionality of smartphones to social media usage on mobile devices.”
In August 2011, more than 72.2 million people accessed social networking sites or blogs on their mobile device, an increase of 37 percent from the previous year. Nearly 40 million U.S. mobile users, more than half of the mobile social media audience, access these sites almost every day, demonstrating the importance of this activity to people’s daily routines.
Research also indicated that although more people accessed these sites via their mobile browser, the social networking app audience grew five times faster in the past year. While the mobile browsing social networking audience grew 24 percent to 42.3 million users in the past year, the mobile social networking app audience surged 126 percent to 38.5 million."

Source:  Press release from comScore, 20th October 2011