Originally Posted by what next
Air traffic, at least in my part of the world, does not fly along airways - which were mandated by ground based navigation aids - any more. There is a growing number of countries that have abolished airways altogether. Aircraft now fly direct routes between convenitntly located waypoints. Therefore it does not matter what speed you fly at, because no other aircraft is flying the exact same route as you.
You are joking, right? So you never fly on STARs?