It seems to improve search results. Google is now returning a broader range of search results (images, videos, crap like that). I want my searches to return more refined results. The more specific the results, the less I have to sort through the mess of unrelated websites that are listed only because they hired and SEO to create 40,000 links to their site. Google lists sites based on how much money the site has to spend on SEO generated links. Yahoo and Bing tend to list sites based more on their content. That is what I want. I don't want to search for "baseball stats" and find out that Amazon and ebay are selling 2,000 books on "baseball stats." Then, when you go to those sites, you find that 99% of those books relate to "baseball" not "baseball stats." I'm ranting, but I hate sorting through the crap search results.
I find myself now alternating between the 2.