What a fantastic statement. So have you downloaded the data recorder to confirm this? How many hours MH-60 do you have and at what Hd and airspeed is that 1000fpm correct? My point here is that you are coming across as a know-it-all and i'm afraid you don't.
Like everyone else, I learn from my betters, and you can't get much better than Nick Lappos:
To get into VRS, the rotor must descend fast enough to catch up with its downwash. That speed DOES depend on the disk loading, and that rate of descent IS around 2500 feet per minute for a Black Hawk.
I shall revise my statement re Settling with Power, they were descending with insufficient power to stop their descent.