The Google search algorithm: one of pure intelligence that doesn't only pick out results based upon the quantitative results; but also the qualitative information.
The reputation of the site is analysed, the social agreement of the link is recorded, and the relevance to your search is decided upon. So when you Google 'What defines an english person,' well...erm...you're best off seeing for yourself. Hopefully it will be fixed soon, for the sake of the search engine's public image. For those uncomfortable with swearing, don't bother carrying on; but if not, click through for the picture. Just don't say we didn't warn you.