The percentage shift in the chart above tells most of the story here. According to Comscore's latest report, Android's share of the US smartphone market grew an impressive six percent in the three-month period ending in March to land at 34.7 percent, and RIM took the biggest hit as a result, slipping 4.5 points to a share of 27.1 percent. That's still enough to keep it ahead of Apple, however, which held its own with a slight gain to 25.5 percent. Both Microsoft and Palm / HP slipped just under a percent each to land in a distant fourth and fifth place, respectively. As for mobile OEMs, things stayed almost identical during the three month period, with Samsung, LG, and Motorola occupying the top three spots, and only Apple seeing any significant gains thanks to the Verizon iPhone launch -- although that still wasn't enough to push it above RIM for the fourth spot. Hit up the source link below for all the numbers.