jbayabas - 1:55 pm on Aug 17, 2013 (gmt 0)
I've never compared statcounter's clicks with Adsense so I can't disprove your statement. I rechecked the clicks of one of my sites for yesterday -- it says 280 clicks on statcounter and 153 clicks in Adsense. Almost 50% difference. However, my page loads/views on statcounter matched with adsense, only 10% difference. Does your page loads/views on statcounter match with Adsense? That's the important question to your problem. If there's a big discrepancy then there's something wrong with your site and not Adsense. However, if there's no discrepancy in page views, then Adsense is registering most of your clicks as invalid.
Just to add that my earnings never suffer at all even with big click discrepancy.
I'll wait for your response so I can better help you.