The IAB Internet Advertising Revenue Report for year 2011 was released on 18-April-2012. Mobile experienced the fastest growth of all categories – triple-digit growth year-over-year – up 149 percent to $1.6 billion in full-year 2011 from $0.6 billion in 2010.
source: http://www.iab.net/about_the_iab/recent_press_releases/press_release_archive/press_release/pr-041812
source: http://www.iab.net/about_the_iab/recent_press_releases/press_release_archive/press_release/pr-041812
