Not sure if this is an old stuff, but i noticed this on a website which I reached through adsense.

http://rohit11.com/share/outer-court/stats.png

It targets to https://services.google.com/sitestats/en_US.html & leading to http://ratings.google.com/ratings/cts?c=&id=1062685021

Yeah, that's been around as long as I can remember. It appears when you add Google's conversion code to track conversion rates from AdWords.

http://adwords.google.com/support/bin/answer.py?answer=6334

Also:
http://www.google.com/search?q=site%3Aadwords.google.com+%22Google+Site+Stats%22