Probably due to their technology:
http://www.google.com/technology/pigeonrank.html -Hank >Google appears to have the capability to georeference their index by country >and possibly with even finer geographic granularity. > >I noticed that they are now redirecting users to country specific versions >of their web page which appears to be done through the various IP address to >location tools. > >Given that Google *seems to know* where the user is, and where the web pages >are, perhaps they are now including geographic relevance in the search >engine relevancy metrics.
