Please lets not split hairs here on the Chinook cruise speed. A wokka can exceed 140, but is not a comfortable ride at max speed, a bunch of VIP pax would soon get upset. The Puma did a 145 cruise at 15.5 degrees pitch on a good day, but we would not be staring at the ASI saying 'OK, 141 kts, different limits!!' It was accepted that the change of rules at 140 would not be required and that we didn't move into the next category. If you wish to hang me for this henious crime, asi accuracy taken in, I may have bust the 140 limit by oooooooohhhh, 1-2kts.
150kts, ok I would agree on a change.