AdMob writes that between October and December, the number of ad requests worldwide from Android devices increased a whopping 97% to over 1 billion ad requests. In other words, the number of requests from Android devices doubled in just two months. Much of the growth was clearly driven by the release of the Motorola Droid. Before the Droid’s launch, HTC devices accounted for 98% of Android requests. In December, that fell to 56%, with 39% from Motorola (which also offers the CLIQ) and 5% from Samsung. Some more stats from AdMob’s latest post: • Increased device diversity: In December, 7 devices generated more than 3% of requests each: the Motorola Droid, HTC Dream, HTC Magic, HTC Hero, Motorola CLIQ, HTC Droid Eris, and the Samsung Moment. This is up from only 3 devices in October (HTC Dream, HTC Magic, and HTC Hero). • Droid Invasion: The Motorola Droid is already the leading Android handset in the AdMob network and generated 30% of requests in December. • US leads Android adoption: 90% of Android traffic was in the US in December, up from 84% in October. Top countries by requests are the US, UK, Germany, France, and Canada, respectively. Of course, AdMob is not exactly unbiased any more — the company was acquired by Google in November. That said, as the largest mobile ad network, it certainly has a wealth of relevant data. Source: TechCrunch