i cannot offer much help to your questions, as i only really know my stats. but i've been thinking about this some...heres what i figure:
-THe distribution of ALL players results is probably close to a bell curve. (but take results per table hour, for multitablers)
-The peak of this bell curve for *sng* is likely quite close to -9.1%roi.
-If you picture a graph, drop in a vertical line at 0%(pre RB)
I'm not going to state that all results are in fact bellcurve, only that it ought to be close, close enough to use the approximation)
So rojo, I suspect that the first question could be answered by finding the % of playerpool to the right of this line (i think the term "sigma" getrs used...been a while, like how many SD's to the right is breakeven.
THe for RB, just move the line left.
For 2+2ers though, ????whothefuckknows? it must be >average, but havent the foggiest how much.
Many have pladged to contibute their Nov/Dec results to make a v. large sample size, so we will have an answer by Xmas
