I humbly disagree. There are plenty of metrics I found to use to make the comparison. I was going to wait out the month, but the CTR was so far below my normal CTR from recent months and from the same month (April) over the last several years that I decided to turn the option off. My CTR came back immediately...and so did the eCPM and revenue. Sorry I wasn't willing to give up 30% of that site's revenue until October. ;).