Baldilocks is right! Most wireless customers receiving a throttling notice mentioned that they were in the 9G+ usage. My guess is when some post that they hit 9G.. they may be buffering the number some and actually went well over 10G like Baldilocks posted.
And I thought "I" used my unlimited data a lot.. I cant manage to use no more than 5G per month and here I am streaming as much as can. I guess there are some power-users out there.