United States:A study released yesterday confirmed what everybody knows: Google has the higher referral rates among all search engines in the United States, according to the percentage of the search traffic sent to other Web sites. Fifty-two percent in June, followed by Yahoo's rate, 25 percent, and MSN's 15 percent.

Jeff Lunsford, CEO of WebSideStory, a digital marketing firm, said "…Google generates more than half of all online search referrals in the U.S., and as much as 90 percent in other countries." Precisely, 91 percent of the German traffic, 41.86 percent in Japan, 73.61 percent in the United Kingdom and 80.76 percent in Australia, according to WebSideStory.