Well, this was just now on the Continentals Server.
Suspect: Runnfra
I do not if he/she was logged in, but I believe he/she was not. This speed was not like any other demos I have seen, it was more controlled, like really fast in spurts, then slower walking, then really fast. It had the same "really fast speed" as the ZGH demos I have seen so, I know this was speed hacking.
If you catch this guy it would be great, because he/she seemed to be able to control it to a degree, which could be a problem.
-Cusoman