netmeg - 6:33 pm on Jun 14, 2010 (gmt 0)
I've been tracking a keyword in a spreadsheet for about three years now. It's a single keyword that I really don't deserve to rank for by itself, but at times has climbed as high as #3. It's almost always been in the top 20. On June 3rd, it dropped down to #67, and now it's hovering around #80. I don't really need it, and my normal keyword rankings are all fine, better than ever really, and my traffic is way up over last year. But this one keyword dropped so precipitously between June 2 and June 3 I couldn't help but notice.
I wasn't optimizing for it, or out link building, or doing anything at all really except for tracking it. And, I'm the first to admit I wasn't strictly the most relevant site for it in the first place.
But that (along with the posts above) would lead me to believe that something did change on that date.