Yes unfortunately some people bind the dvar to two different keys. Normal and ultra low. If you see someone running smoothly, and then he suddenly starts warping around when being shot at, then he clicked the 'low' button and ran away. I once saw one semi-regular, who shall remain nameless, moving around perfectly fluid and then I took one shot at him from close range. Because I suck as a player I missed. But he warped away with his lag bind like a little bitch. ?
You can usually spot this kind of thing and often it tends to be by the same players over and over during a round. If its a populated server with only a few people doing it, its annoying but doesnt take away from the fun. But when half the server, or more, is doing it I dont even bother and go elsewhere.