And even if Sprint ... I know "unlimited" is complete bullshit...Not tell me unlimited but really it's 2 GB then throttled to dail-up speed afterwards.
The only sense in which Sprint does "throttle" per say is based on on current tower useage like any other carrier. Once a tower gets "full" they allow everyone to get an equal slice of the pie. But this metric doesn't take into past data usage.
This is very different from the straight 128kbps cap ATT throws on their "unlimited" users that use too much data.