This has been gut wrenching to monitor.  Not only are the biggest pools growing in hashrate astronomically, but they are finding blocks well over 100% luck on a large scale for this difficulty adjustment coming up.  Antpool is at 121% luck for the last 3 days!  That is literally insane.  The difficulty projection jumped from 14% to almost 20% just in the last couple hours for the ENTIRE 2016 block period due to how many blocks the network is finding right now.  And ofcourse Bitcoin is tanking as well..........