We noticed last week at the WACVB Destination Marketing Tech Summit that there were a lot of Androids amongst DMO attendees – not as many as iPhones, but still a remarkable number.

The latest AdMob numbers tell the story:

AdMob serves north of 10 billion ads per month to more than 15,000 mobile websites and applications. Thus, although its data is about ad rather than page impressions, it can be taken as a pretty robust indicator of how web usage habits are developing and changing over time. Android is the big standout of its most recent figures, with Google loyalists now constituting a cool 42 percent of AdMob’s smartphone audience in the US.

Given the trend lines, the Android’s probably in the #1 position by now and is likely to maintain it, at least until Apple introduces a version of the iPhone that’s not dependent on the somewhat flaky AT&T cellular network.