IanCP - 10:32 pm on Mar 8, 2012 (gmt 0)
Another point I've noted about relevant ads for my genre.
Relevant ads = higher CTR = much higher EPC as well.
Krap ads, krap CTR, krap EPC go hand in hand.
[ADDED] I've been in AdSense since June, 2003 so I don't think AdSense is going to continually serve up quality ads on my sites if the advertisers aren't receiving value for money.
Or so we are told.