Setting up a 7000+ rate of descent in 12 seconds is not that easy. You would have to push hard and fast forward. Negative G.
I don’t buy that at all. 200 Kts is about 20,000ft/min. Sine 20 degrees is about 0.34. So setting -20 degrees would easily give you 7000 ft/min rod and easily achieved in 12 seconds.
I used to fly rotary and had an opportunity to do some work with the senior Honeywell scientist on EGPWS. I took him for a jump seat ride once and I showed him how quickly rate of descent built up with pitch down. From 145 kts cruise I selected -5, -10, -15 degrees pitch down (separate demos). The rate of increase in rate of descent was eye watering. It was connected to seeing how the Mode 1 alerts could be improved.