We arrived at ELATO about 5nm behind a much slower aircraft the other night 4000ft above us. I was already dreading the speed reductions and zig zags but thanks to the controller who wisely told us to maintain high speed, quick pass the traffic then let both planes descend normally. It is obviously the most logical way to do it but the first time I have experienced it. Usually it seems to be 'whoever is in front wins' with us having to zig zag all over the place and slow down and totally screw up the descent just to appease a slow 737 or A320.
Hope the sensibility continues!