After Google’s stock took a hit based on reports that Google ads are not being clicked on as much as they use to be, comScore is reporting today that the market may have got it wrong. The evidence suggests that the softness in Google's paid click metrics is primarily a result of Google's own quality initiatives that result in a reduction in the number of paid listings and, therefore, the opportunity for paid clicks to occur. In part this might be right, but what’s being ignored by most is a little decision in November that changed the way Google ads worked: Google has made a small change to AdSense that may make a big difference in cutting out errant clicks and even your AdSense reven ...