Freedom - 7:34 pm on Jan 13, 2011 (gmt 0)
I think their claims and complaints are legitimate. There is no reason to be condescending to their interpretation of events. eCPM can defy logic sometimes.
For the last 7 years, I have observed one consistent trait about Adsense that has never failed. Not once. eCPM on Thursday's is always half of what it is on other days of the week. Why Thursday? I have no idea. But ever single Thursday for the last 364 weeks, Google is throwing a 50 percent off sale on my eCPM. We are already intelligent enough to try to apply your stated obvious reasons to some events but the pieces don't always fit.
When I wake up Thursday morning, every Thursday morning, I know I am going to have a bad day on Adsense before I even log in.