You forgot about PM uses less power than any other miner like lol or TR. So his loses in effectivity about some part of percent compensates by power economy in some percent!
I certainly could write a kernel using way less power (actually one for 8Gs is on the way) ... but pushing that too far would need me to fake the hashrate to get users on it... ahm ... wait...
Sorry Lolli that your miner wasn't included but it was after everything already started... Perhaps I will do another one after the 1st of the year for some others that I had missed