3 ms·

They literally announced it on their blog in 2009. https://googleblog.blogspot.com/2009/12/personalized-search-for-everyone.html https://googleblog.blogspot.co

• Bartweiss 8y ago
  That 2009 announcement makes several very specific promises which conflict with these results. It promised signed-out customization based on prior search history (which Google has confirmed Incognito doesn't use), with a notification and option to disable that customization. This result finds substantial variance with no notification and no toggle, which extends almost unchanged into Incognito. I think Occam's Razor says this is about localization and device type than fingerprinting, but it's definitely not just the thing they announced in 2009.