Chapman - 3:27 pm on Apr 10, 2013 (gmt 0)
The CTR thing has me concerned as well. Traffic has been fantastic all year but March brought only about 30% of my average CTR. So far this month it appears to be improving and I've seen it slowly rise to 60% of average.
I concurr with the ads being VERY untargeted (no matter how much blocking I do through any of the tools) but have not witnessed the slow serving syndrome.