Play_Bach - 6:20 am on Jan 20, 2013 (gmt 0)
In looking at my web stats, I notice a big jump up in Google traffic on the 18th, the very same day I had the lowest earnings all month. Normally, I'd attribute more traffic equal to more earnings. Not with AdSense.
Here's what I think is going on: AdSense has safeguards in place to sniff out fraud, and spikes in traffic with a sudden rise in clicks might trigger an arrest. I now suspect my earnings for the 18th are being reviewed and (at least I hope!), will be released as soon as they prove to be legit. It'll be interesting to see how the next few days play out.