Android is making steady gains in mobile ad market share, accounting for 6 percent of all mobile ad requests measured by AdMob in its latest March metrics. That puts it neck and neck with the Palm OS, compared to a 5 percent /7 percent share split in favor of Palm just one month before.. Windows Mobile Devices also saw a share decline from 13 percent to 11 percent, while Blackberry’s RIM OS gained a point to 22 percent, and the iPhone stayed the same at 50 percent.
AdMob measures ad requests from both mobile browsers and mobile apps, thus its numbers are a good proxy for mobile Web usage (minus paid apps which don’t serve ads, of course). On a device level, the Android G1 (HTC Dream) actually overtook the Palm Centro, becoming the No. 4 smartphone in terms of Web usage in the U.S. (after the iPhone, the Blackberry 8300, and Blackberry 8100).
