In September 2007, Google’s sites remained the top search engine property with more than 5.3 billion searches conducted by Google users. This represented a 57 percent share of the overall search engine market in the USA. Yahoo!’s sites and the Ask Network posted gains during the September 2007.
At the end of the day Google is an artificial engine based on a search algorithm. You can use this fact to your advantage and in fact this is how I managed to outrank Google.