Google has always done very well by having a clean and uncluttered homepage. The usability aspects of this are made even more obvious when you compare results from a competitive search query such as “mobile phones” across both Yahoo and Google.

As you can see from the screenshots Yahoo only manages to fit 2 natural listings before the fold on my 22 inch monitor whereas Google has 6 results showing. This is why Google will always be most peoples favourite search engine and also why you don’t want to be outside the top 2 results on Yahoo.