Google Instant is making me a little sick to my stomach. Does anybody know if they're logging all your "potential" searches? And whether or not your old search history still exists?
Search History is still there. Here's an example with Google Instant:
8:54pm Searched for google instant messenger 8:53pm Searched for test 8:51pm Searched for instant google voice invite 8:51pm Viewed results for instant messenger (paused for at least 3 seconds with no click) 8:51pm Viewed results for test tube (paused for at least 3 seconds with no click) 8:51pm Searched for test
It's not very accurate. I only typed "Google Instant" and it showed results for "google instant messenger" and logged this wrong query.
If you pause on a results page for 3+ seconds it counts as an impression and adds it to your history. Or if you hit enter to confirm your search. Or if you click on a result or advert.
Same goes for advert impressions in AdWords.