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. With the EVO 4G and
