Kano gives the statistics of this being variance.
https://bitcointalksearch.org/topic/m.13379545
Best Regards
d57heinz
Very interesting, and says that this is a real increase, still leaves unanswered why it is switched on & then off again?
A question for those that know? How is the network Hash Rate & Individual Pool shares measured? Is it all worked out from the speed that blocks are solved & who solved them or is there other information involved?
Rich