ComScore: Google and Microsoft Rise, Yahoo Fall in October 2009

comScore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, released its monthly comScore qSearch analysis of the U.S. search marketplace on Oct 17. In October 2009, Americans conducted 14.3 billion core searches, with Google Sites accounting for 65.4 percent search market share, up from 64.9 percent in September. Microsoft Sites grabbed 9.9 percent market share, up 0.5 percentage points versus September.