google change Personalized Search to include logged out users

http://googleblog.blogspot.com/2009/12/personalized-search-for-everyone.html

This is going to make it harder to keep track of your sites serps (unless you opt out of it), but how is it going to effect normal traffic ?

I suppose most searchers tend not to have google accounts, or do they ?

 

argggghhhhh.....

Not liking that. Having to go and delete cookie just to see a normal result without having to click that line every time.