Interesting, it is, but is comparing electricity really a fair comparison? I'm not sure its possible, but wouldn't it make more sense to compare energy? VISA has brick and morter buildings, running the lights, is that accounted for? All the employees driving back and forth to work. In my understanding, which is lacking somewhat, many bitcoin servers only full power up when electricity is cheap, or overly plentiful, so at least some of computation shifts to utilize under utilized energy, which could help level energy loads.