Just a quick question for all the cash game math experts out there...how many hands are required statistically before winning or losing a buy-in at a certain level will change your bb/100 by an insignificant amount (ie. <0.1)?

In other words, how many hands are required before win rate stabilizes?

I can tell you that the number is for sure >20K hands (thank you Full Tilt for Rush Poker!)

Just wondering! Thx.