"Should a telecommunications company be able to advertise its Broadband as “supersonic” when its speeds could be as low as 64Kbps?
The problem with these plans is that while the usual speed is 100Mbps, if a customer goes over their download limit for the month their speed is slashed to just 64Kbps. The Australian Competition and Consumer Commission (ACCC) isn’t happy about Optus’ sensationalist claims, which it is sure breaches the Trade Practices Act."
Apparently Optus is being taken to court for naming its service "Supersonic" when it's also throttled after a cap.