Also so true about the tilt factor as you can spew a lot more in a shorter time I just don't play if I have lost more than a couple of buy-ins, very strict that way although it has been known before implementing this to have a 15 bi streak.
When I say about 6 tabling I mean full ring only couldn't or wouldn't try it with shorter handed but as said I think 4 full rings is fine you are still doing about 1000 hands an hour. I know some regs do more as you click find this player and it shows them on 6-8 tables across stakes.