According to AdMob’s May 2010 Mobile Metrics Report (PDF Link), more than half of all iOS users are outside of North America, compared to 67% of Android users and 58% of iPad users. 43% of iOS devices were in the U.S., followed by 9% that were in the U.K., 6% in France, and 5% in Canada. Notably, both iOS and Android represent much higher usage than share of handsets sold, with iOS representing 40% of mobile app and web usage compared to 15% handset marketshare; Android stood at 26% and 10%, respectively. iPhone’s worldwide share of traffic generated by smartphones stood at 39.9% in May, well above the second-place Motorola Droid with 6.8%, but down significantly from its 47.9% share in May 2009. AdMob’s Mobile Metrics Reports are based on data gleaned from the company’s network of more than 23,000 mobile Web sites and applications around the world.