One Google's leading executives, Marissa Mayer, is leaving the company to become the next CEO of Yahoo, the New York Times reports. Mayer is said to have resigned from Google by telephone just this afternoon, despite starting with Yahoo on Tuesday. In an interview Mayer claims that she "had an amazing time at Google," but that it "was a reasonably easy decision" to jump to Yahoo, which she calls "one of the best brands on the Internet." The executive was first approached about a Yahoo job after returning from a trip to China in mid-June.