I think its an excellent tool! Since it averages many sources it tells me what I want to know -- who generally will be available at each spot I draft. Of course you have to apply "local knowledge" (league members traits and prefrences).
I just separate every twelve picks to get the rounds and circle my draft position in each round -- gives quick snapshot. If you do it on just one or two websites/fantasy mags it can be very misleading!
thats interesting. i'd like to know what the sources are. also, i guess i am sort of stat nut but i think it would be helpful to show the median and standard deviation. its super easy if you have excel.