His ess/hour are way off. With graahk you can get 5.4k nats/hr and if you combine it with mouse keys a max of 5.6k nats/hr. But your in the ballpark 800k-900k gp/hr seems to be the max. I've personally tested it multiple times and was able to achieve over 3k ess per hour using Spirit Graahks. I will admit though, it was nerve wrecking - absolute concentration, perfect banking, no back-tracking. I wouldn't be able to do it for multiple hours. Your estimation of 2.7k ess/hour is probably much closer to what most players get on average. Note: I tried it prior to the bank tabs update - since then I continue to get slight lag and other problems with banking fast and most likely would no longer be able to do it at that speed.