Nor did I imply such, Sultan.
The John Lovell quote re significant rotor speed droop, with no indication of what " significant " means in this instance, naturally provokes thought about what can cause that. My post 29 had a few thoughts about that. What I can add from experience is that cutting one engine from a two engine condition at the higher helicopter speeds, and under the assumption it is done in a controlled incremental build-up manner, shouldn't result in an Nr droop that would be abnormal. The speeds you mentioned, I.e., the 200 kt range, would be a dive point, hands on controls, with normal pilot reaction time. But as I wrote earlier, the information provided publicly to date does not allow the formation of any hypothesis that is defensible.
As to SA ( and I guess as a retiree that includes me ) reading Part 29 re the 30 min dry run Reg's , please check your PM's.