Any data to support this? test configuration, aircraft type, AUM, IAS, RoD?
Aircraft was an AS350, that's all I know. But again: feel free to contact Mr Vuichard directly yourself, I'm pretty sure he can give you all those details.
The CHC crash would not have been avoided using this technique - you have to recognise you are in VRS first. There were a whole lot of other factors which could have prevented it.
Sure, this is all speculation at the end. But from what I read, it kind of fits the scenario in my opinion:
There was then a second automated call of "check height" followed by a "100 feet" automated call. The report stated: "At some point the commander saw the sea, but he was unable to arrest the helicopter's descent and it struck the water shortly thereafter.
So the pilots didn't have much altitude left, certainly not enough for doing a standard vortex recovery.