- Instant doesn't show the results for what you've typed so far, but rather the most likely query we thing you are going to type. So, if you have typed in [greg groth] but not yet hit enter, you'll see this site at the top of the results instead of a page about Gregory Groth, Attorney at Law.
- As soon as your mouse touches one of the results, the URL bar changes to include the query that results were shown for as the q= parameter instead of the incomplete query that is actually in the search box. This way, web site analytics don't break and start showing lots of substrings of the real query.
- If you are interested in what was actually in the search box, the oq= parameter gives you this information in your logs.
- For the sake of counting "impressions" in either your Advertising Console or your Ad Console, not all search results shown get counted as many of them the user ignores. A result gets counted as an "impression" in any of these three cases:
- A user clicks anywhere on the result page (search result, ad, etc)
- The user chooses a query interpretation by clicking on it, hitting enter, or pressing the "search button".
- The results are displayed for a minimum of 3 seconds.
- In any of the cases of the "impressions" above, an element is entered into your browser history, making the forward/back buttons work just like you'd expect.
- Google was careful not to accidentally suggest [porn] if you are typing [por], instead you get results for [porsche]. Similarly, if you type something with no real "safe" suggestions such as [porn], you get no suggestions at all and have to explicitly complete the query first.
Update: If this was interesting, you should also see today's blog post: Google Instant Behind the Scenes