These are things you start to find interesting when in library school - embarrassing but true:
This isn't funny, but I think proof that search engines are kind of a crapshoot. Here is a website where you can blindly search Google, Bing, and Yahoo and then vote for which result you think best matches your query. You might be surprised at what you find. I chose each search engine once. Others are leaning towards Yahoo and others towards Google. The point here is - while Google might make up 70% of the market share or something like that, is there really a reason for it? Is it really that much better?
Try for yourself at Blind Search.
And if you want to read more, here's an article about it from The Washington Post.