Not sure how much i had used prior to launch, because i never pay attention. (i have unlimited data). I know i usually hover around the 2GB/month. Well my billing cycle starts on the tenth each month and I've already burned through 6.3GB this cycle!
And with 20 more days to go! Thank goodness for unlimited data. And, no, I don't tether, though i stream music through Google Music a couple hours a day.