Oh dear,
Helicopters are largely unaffected by it. In 30 years the only wake turbulence I've encountered is from another helicopter.
A statement of the poster's (a helicopter pilot) 30 years experience. Kind of relevant I would have thought and useful to the debate.
but...
Complete and utter nonsense, helicopters are just as at risk from the effects of wake turbulence as fixed wing, in fact, due to the reduced time a helicopter pilot has to react to and recover from such an issue compared to fixed wing, it's even more important that the departure separation is applied.
... and this is based on?
There are absolutely no facts to suggest otherwise
Really? See quote 1, above. At least one experienced helicopter pilot might suggest otherwise.
I might suggest that Helicopter pilots are also a lot more aware of local wind effects and have better SA all round. They need to have.
Wake vortex is indeed poorly understood, and I know of several occasions where it has clearly contributed to accidents to fixed wing aircraft. Not sure I recall any affecting helicopters though... Enlighten me.
BEX