The stats for Smartcash (Keccak) on smartcash.cc looks interesting, for minimal change in number of workers, the hashrate varies between 2TH and 5TH. This is across the US and EU pools.
https://us-mine.smartcash.cc/statsAnyone knows if this is just a display issue?
I was thinking about the FPGA pre-testers but that is a huge number...