Mad (Flt) Scientist,
IMO, the question is not as much on VMO or vastly exceeding it, but more on the fact that those 'crews' supposedly successfully adapted in no time from 100 knots on Cessna 172 to 500 knots on Boeing 767 to precisely hit their target, and so with no waste.
Weight and speed make a huge difference on the control inputs with target in sight ...
That capacity for adaptation seems simply miraculous to me.
What did they train for in their simulator sessions if they did any ?
Is that information available ?
Did they only practice 360 knots at 1000 feet ... ?