Something caused the Ethereum hashrate to Double in less than two months.....I dont think it was this E3. I dont think it was new GPU's.
It was the hidden Bitmain Eth Asic. Lets hardfork and watch the hashpower lose at least 35%!!! Its the only way to know for sure.
Steady rise since December = batch 1 units hit network. Bitmain is rumored to have mined for 3 - 6 months with equipment before refreshing hardware and selling the old stuff. Very likely what's going on here.