This really does sound like an inflammatory statement. Some people, shockingly enough, don't care about efficiency. Many people here, do not care about efficiency; that is why they overclock and overvolt - But if you do care: there are choices in the market. You don't have to be so condescending with your statements.
I am one of those people, I don't really care about efficiency when I over volt my system. When I unlock the voltage on my Lightning 680 SLIs, my power use goes up dramatically - in fact, i've measured power at the wall being near 900 watts when I use 1.3V on both of my lightning 680s. The power use is far less using stock kepler voltage though.
Do I care? No.