Previously we have seen posted some deductions about Thursdays being the day Adsense recalculates the smart pricing of a site. Didn't really see that or believe that theory at that time ....but last 5 weeks have seen tremendous swings in revenue in the Thursday to Thursday timeframes. To the extent can actually see whether the next week will be above average or 50% less.
Anyone else seeing a weekly cycle developing on their site? May not be the same days as we see but something similiar.