Mobile ad delivery platform AdMob has released a report that shows that smartphones accounted for 48% of its worldwide traffic. That's up from 35% in February '09 fueled by heavy app usage on iPhone and Android devices. Mobile internet devices experienced the strongest growth, increasing to account for 17% of traffic on AdMob's network. Although the vast majority of traffic in this category comes from the iPod touch, it also includes devices like the Sony PSP and Nintendo DSi.worldwide traffic.
