If you plan and fly something different it has the potential to get nasty for the ATC. I'm not saying you all are going to crash and burn because it WILL get picked up. But a bit of professional courtesy can save your friendly ATC from a little 'holiday' and un-favourable comments being inserted on their record. And it will ensure that your 'friendly ATC' stays friendly.
Spot on. If you are going to fly at such ridiculous speeds why don't you excercise some airmanship and tell someone.
Better still everytime you get a flightplan with this ridiculous cruise speed ring dispatch and enquire as to why it is so. Then complain to fltops via whatever means you have available everytime it has obviously cost you a slot in the sequence.
Help ATC and they will help us!!