Having used duckduckgo for a few years, which does not personalize results by default, I don't think it's even that much. More like, a factor of 3-5 on select s

Having used duckduckgo for a few years, which does not personalize results by default, I don't think it's even that much. More like, a factor of 3-5 on select searches and not at all (occasionally even negative) on others.