Android now has roughly twice the market share of the iPhone in the US but owes this to a rash of Americans defecting from the BlackBerry, NPD researchers learned today. Google's platform shot from just three percent last summer to 44 percent this year, but almost all of the gain was at RIM's expense as the BlackBerry collapsed from 46 percent to 22 percent in the space of a year. Apple did decline over the period, but at a far gentler decline from 29 percent to 23 percent.
