Now that's funny - happened to be looking at the search queries chart on Google webmaster tools and true enough I had a 95 percent traffic drop on 6th.
Apart from that it's not been a bad week. Revenues up a bit, traffic much the same, serps much the same. Checked through my server logs and google.com referrals are still at a constant steady level.
Does anyone noticing a drop happen to use Google Analytics as their main data source?