tidewatcher - 11:09 am on May 11, 2012 (gmt 0)
Had he best day of the month yesterday by quite a long way -- earlier in the month had a number of bad days. Inconsistency day by day seems to be an adsense hallmark.
From my observations it appears that Google might be holding back reporting high playing clicks sometimes and then processes them all at once. That could account for the extreme variations between good days and bad days