As fo late, there is quite a bit of online discussion about how Google search results seem to favor Wikipedia. As Search Engine Round Table notes:

A WebmasterWorld thread discusses how Google may be treating Wikipedia a bit too well. We all have seen it, search on anything generic and you are likely to find a Wikipedia result at the top.

Here are some random examples as I write this entry:

parrots - Wikipedia #1

farm - Wikipedia #3

viagra - Wikipedia #2

baseball - Wikipedia #2

search engine - Wikipedia #4

Indeed, it is hard to ignore how searching many terms will yield a Wikipedia result, often in the top three results. Give how search engine rankings are determined, moreover, some of those results are understandable, and other are baffling. What is more baffling, however, is why Google would favor a site that has yet to feature advertisements.