It almost certainly does. Very few people realize they're giving Google insight into their live thought processes as they type a query, maybe refine it a few t

It almost certainly does. Very few people realize they're giving Google insight into their live thought processes as they type a query, maybe refine it a few times before submitting (which gives google a lot of information about if their autocomplete suggestions are working, relevant, etc), then bouncing around search results with further refinement. Google got greedy and started tracking every click you make on search results a long time ago too. They weren't content knowing "this person got a good result and didn't need to come back for this query again" — they decided they must know what you click on, when you come back, what you click on again, .... It's all quite invasive, but nobody cares. [but who are we kidding? most people don't "refine queries" — they type "BOOBS" into google and just keep drooling on their keyboard/tablet/phone.]