I loaded this page in Chromium 2.0.165 (rev 10142): http://www.google.com/finance?q=NASDAQ:CSCO and the AdSense block is not displayed. The source code doesn't include the AdSense code and there's even a no_ads variable that has the value 1.

http://img258.imageshack.us/img258/4048/financenoads.png