I'm not a Developer but I'm pretty sure that the speed was measured in the unit of metres per second (m/s).

Age: 14. Region: United Kingdom, England. Experience: Played Tribes 2, and Legions Clan Experience: I've been part of quite a few clans, and all of them failed because they all quit legions and went their seperate ways, I like the community but disliked some members of previous clans not...

Time to clean the dust of my headset then I guess.