"After having raced to the No. 1 spot in less than a year -- climbing from a 15% share in June 2010 to 37% in March 2011 -- Google held steady at 36% in the three month period from Feb. to April
2011," CNNMoney.com points out. "Apple also held steady."
Indeed, Apple's market share over the past three months remained at about 26% -- within a few points of where it's been in Nielsen's surveys for more than a year. RIM's BlackBerry, meanwhile, may have started to slow its long decline, settling in at 22% to 23%, according to Nielsen.