Android platform continues to grow dominant position in the US.

This via ComScore - as we've already known from other metrics - Android has become the dominant mobile OS in the United States.  Note that, after a full quarter of sales of WP7, Microsoft's market share in the US continues to slide; that -0.9 percentage point change represents a 10.7% decline over just one quarter.  With each passing month, WP7 looks a lot like Palm's WebOS' introduction, and subsequent decline.

Top Smartphone Platforms 3 Month Avg. Ending Mar. 2011 vs. 3 Month Avg. Ending Dec. 2010 Total U.S. Smartphone Subscribers Ages 13+ Source: comScore MobiLens
	Share (%) of Smartphone Subscribers
	Dec-10	Mar-11	Point Change
Total Smartphone Subscribers	100.0%	100.0%	N/A
Google	28.7%	34.7%	6.0
RIM	31.6%	27.1%	-4.5
Apple	25.0%	25.5%	0.5
Microsoft	8.4%	7.5%	-0.9
Palm	3.7%	2.8%	-0.9

Apple is the anti-Microsoft crowd; a good deal of people I see with iPhones also have Apple computers, which means that they're less likely to switch from the iPhone to WP7 because of their distaste for Microsoft.  Google is gaining that sort of fanatical fan base - in part because of its integration of mobile products with Android - that Apple has.  How much time does Microsoft have, to make a compelling case to non-smartphone users to adopt the WP7 platform?

Sorry, no March 2010 data publicly available from ComScore.