Changes in the SERP URL
According to Matt Cutts, Google now has a more detailed referrer string than what it used to. A few months ago it would simply link to website’s URL directly. Now if you click on a link in any of Google’s result pages you will notice the link leads to something that looks like: http://www.google.com/url?sa=t&source=web&ct=res&cd=1&url=http% 3A%2F%2Fwww.dejan.com.au %2F&ei=xxx&usg=xxx
Note: cd=1 means that the user has clicked on www.dejan.com.au while this website was on the position 1 in the search results. Matt explains this feature is to encourage SEO companies scraping the results to check their client’s positions and to use it for better data analysis. Google did not announce whether this feature will be available to all regions not if it will remain as a permanent feature.