JesterMagic - 2:45 pm on Dec 12, 2012 (gmt 0)
That is not true, g$$gle personalizes your results even when you are not logged in. Maybe it is new. But I never log in, because google+ is just like a backyard where kids do not want to play.
You use to have to turn off your web history even if you were not logged in as it defaulted to enabled. I would check this like once a week because it would always switch back on for me. Now this feature is only available for logged in users. Good for Google (I have been cursing them a lot lately).
This is what google says about it under search settings and search history:
When signed in, you can receive more relevant results and recommendations based on your search activity. You can turn off or edit your search history at any time.
Google of course still personalizes your results on other things that you have no control about like location. If I Google a popular classifieds site on Google.com from Canada my results display a lot of Canadian city links to that site