I highly doubt it was lag, I've never had a problem with lagg at all on this server even though i am Australian.
It isn't as you Americans would experience the game being nice Abe quick, but that definantly was NOT lagg. Also, if you would have listened to the vent chat in game, the other player i was PvPing in my guild with (Potodv) clearly states he sees it happening aswell, if you want to watch the whole video, there are many examples of this and times when you can clearly see the speed hack used. (As well as the introspection being used)