<< I think Jex is right, they just ask a bunch of people 'whadya listening to?' and make an estimate based on their results. >>
Yeah, they also forget to mention 'margin of error +/- a few million'.
. <~~ Do not breathe on the dot.
"Remember when your mom shoved brussel sprouts down your throat regardless of how many times you told her you hated the things? Even when there was god damn corn right there in the fridge? Yeah, thats Microsoft." -shortylickens