This article from TechCrunch.com states that Google has doubled its smartphone market share over the last few months:
“In the three months between October and January, Android’s overall share of smartphone subscribers in the U.S. rose 4.3 points to 7.1 percent, according to mobile market share data released by comScore. Android showed the biggest single gain of any of the top five smartphone platforms. Apple’s share was virtually flat at 25.2 percent up 0.3 percent, while RIM’s Blackberries saw a 1.7 percent gain to 43 percent.”
via Google Gains, Apple Stays Steady, And Palm Loses In Smartphone Share.