The most attractive function on Google is the news function.
For example, if you search "Yahoo" on Google, on the first result page, you will find a link called "News for Yahoo", if you click that link, you could view all the latest media news about Yahoo.
Apparently, Yahoo search or Bing search is missing this very important function which makes both Yahoo search and Bing search look very outdated.
I believe that's the most important reason why most people likes Google search better than Yahoo search or Bing search.
If Yahoo could push Bing search to add this function, Yahoo and Bing search might be able to grab at least 10% of the market share from Google IMHO.