I stopped reading news regarding SEO long time ago so maybe I missed something.
I've been working a site for the last few days, ofter entering my keywords in google to see what's my position.
Today I noticed that I'm at #4 postition which suprised me. To be sure, I used proxy to see that I'm actually at #20 postition. The same happened when I removed google's cookies.
In short: It looks like Google somehow customize the results, basing on cookies, does it? Btw: no, I was not logged in (I've read somewhere that indeed google brings somehow customized results for logged in users, but, as I said, I wasn't logged in).
So, does google change the results, after identifyng users basing on cookies?