I think it's clear that the number of points needed to qualify for an "established" BKR is too small in backgammon games. It's only necessary to view the ridiculously inflated ratings at the top of the lists and notice the small number of games behind them to prove this.

I believe that the BKR formula provides for larger ratings adjustments for players under a certain level of experience (500 points?). I would recommend that this number be lowered -- say to 100 points -- and that the same number be used as the dividing line between provisional and established BKR.