I think the term is "reversion to the mean".
Honestly not sure why the author chose these timeframes because they do nothing but add confusion. A 30 day, 7 day, and 1 day graph would be more useful. Maybe add in a "since last dividend" and "since start of mining".
ASICMiner historial hashrate average (all blocks over all time since the start of mining) has only averaged ~30 TH/s. This lifetime average has flatlined over the last couple weeks. You only get paid on what is actually mined.
+1
EXACTLY
guys, the 6 hour and 12 hour estimates are almost worthless, just ignore them. They will get your hopes up and/or become your worst nightmares if you let them.
36 hour is better, 48 is even better than that.