tedster - 7:43 am on May 13, 2008 (gmt 0)

Something definitely shifted on Friday May 9 - See this thread: Traffic May 9 dropped 75% [webmasterworld.com].

But so far, this shift is hard to pin down. My best guess currently is something significant in regards to Google's geo-location of search results. None of my sites were hit like that, but there are several reports about last Friday's shift rolling in, and they are all puzzled about the cause of the traffic drop.

I think some of the geo-location search strategies discussed in the following thread might be worthwhile looking into: How to search for US results from outside [webmasterworld.com].

Especially note the use of the "gl=" parameter, proxy servers or VPNs, and the Adwords Preview Tool at https://adwords.google.com/select/AdTargetingPreviewTool