The search results load via Ajax. That's the main difference that I see. Also notice that the URL changes when you type in your search result, but that the query args are sitting behind a # anchor. Normally, those values don't get sent via referrers, which would mean that you wouldn't get that information in the referer header on the server that hosts the search result when the user clicks it. However, in this case, Google is doing HTTP redirects in order to send that information along. At the very least, we can see that the format for their URLs has changed. But they may just be in a data-gathering mode right now. If they turn off that redirect, you won't be able to deduce the search query that the user typed in based on your webserver logs.