I feel the same way, and I accept the higher speed if I am overwater (outside 12 sm or about to be) but having flown these routes with three different Asian airlines, I have seen limited knowledge of US rules and procedures. I have asked the FAA in LAX to clarify the matter with the airlines concerned but they will not do it. If the controller tells me, unprompted, to maintain "High Speed", I will take him at his word and I can hardly blame a pilot whose first language is not English for doing the same. It may be well understood what is meant by US pilots in the US, but I know the FAA controllers are aware that the many foreign pilots who fly into the US are not so knowledgeable. It also does not help that the US is the only country that does not allow the controller to permit higher departure speeds. Perhaps if the US followed international rules this confusion would go away.