To me, the definition of a speeder (or speeding)is somebody who is exceeding the posted limit AND outpacing the flow of traffic. That causes a dangerous situation where the increased rate of speed can surprise other drivers. Same with people going significantly under the posted speed limit and flow of traffic...the element of surprise can cause problems. I prefer to keep pace (provided I am comfortable with it) rather than live by the book. Case in point, if it's dead of winter and the roads are slick, flow of traffic is going 50kph in a 70kph zone. Buddy going 70kph is passing other cars by 20kph. Is he speeding? I say he is.
So in the grand scheme of things, going by conventional definition of speeding, I do speed becuase I do exceed the posted speed limit....if the flow is also above the posted limit. However, I don't think I cause a dangerous situation if I flow with the traffic speed. So if we want to sit here and split hairs and determine what everybody's definition of speeding is...go on ahead, I know what mine is and if some people want to call it 'pulling ones leg' or say I have posted 'contrasting' statements....