Google, Yahoo and Bing Spetember 2009 market share was just announced by Comscore.com. According to them, “Americans conducted more than 13.8 billion core searches, with Google Sites accounting for 64.9 percent search market share. Microsoft sites are up a nominal .1% percent market share and Yahoo is down .5%.” Essentially Google continues to gain market share. Click here to read the rest of their data.