Google leads US search market

Top US Search Providers for May 2007,
Ranked by Searches (U.S.)

1. Google Search 56.3%
2. Yahoo! Search 21.5%
3. MSN/Windows Live Search 8.4%
4. AOL Search 5.3%
5. Ask.com Search 2.0%

An estimated 4.0 billion search queries were conducted at Google Search, representing 56 percent of all search queries conducted during the given time period.

References
Nielsen//NetRatings MegaView Search, June 2007