As I've written before, the maths don't justify the claims.
VRS can result in descent rates of 3,000 ft per minute or considerably more. Been there, seen it in a military Puma. VSI only went down as far as 2,500 fpm and it was firmly pegged on the bottom stop.
3,000 feet/min ROD = 34 mph downwards.
Some here claim that this can be stopped in less than 50 feet?
The claim is that aerodynamic control during the recovery from fully developed VRS is more effective and more sudden than an emergency stop in a car on a dry road! Try driving any non-ABS equipped car at 34 mph, applying maximum braking and see how long the skid marks are.