[threeonefour]

over 150000 datamined hands at 5/10 (all of the hands are from november) i can say with great accuracy that the average rake at Party is 3.20% (2.14$ from an average pot of 66.86)

which is quite a bit higher than the number you have
EDIT: the average BB/100 paid in rake is 1.9 which matches your number almost exactly. i wonder if the hands taken from the sample you quoted were a year or two old. back then the average pot size was larger which would lower the %