This new shouldn’t shock any of Apple’s followers, but its built a dominant lead in web presence for mobile devices, particularly in the US.

The popularity of Apple’s WiFi mobile platform as a handheld web browser device is rapidly accelerating worldwide and dominating web traffic in the US, according to a new report issued by mobile advertising firm AdMob. Apple’s strong position promises to color how the mobile web develops in the future.

Based on its logs of worldwide web traffic to mobile devices, AdMob noted that international web requests from the iPhone increased by 86% month over month in December (amazing!), giving the smartphone a 10.8% share of all mobile device requests, which far outpaces RiM or Windows Mobile (and basically buries Palm by double digits). Android is only at 2%, which is the lowest of any platform.

iPhone web traffic in the US jumped to 48% from only 9% last May, which is a more than 5X increase. Its adoption has been slower in non-US countries, but its catching on there too.