iPhone OS has 70% share of smartphone impressions in March
Millennial Media, an independent mobile advertising platform, said today that mobile connected devices like the iPad and Sony PSP displayed more than 20% of the giant ad networks’ ad impressions in March, a trend that could have far reaching impact on mobile advertising as these devices grow more popular.
http://www.macsimumnews.com/index.php/archive/iphone_os_has_70_share_of_smartphone_impressions_in_march/