Size and gross weight have no bearing on VRS, actually the 2 times I have been in it it was both times in an empty a/c.
my point exactly - in a light aircraft with a big rotor, the downwash speed is much slower as you need far less power to hover. Therefore much easier to get into VRS.
It's not about the size and gross weight of the helicopter, it is disc loading which is AUM vs size of the rotor.
I am just passing on information from the likes of Mr Lappos who generally seems to know his way round a helicopter
If you don't like or believe it, that is up to you but that doesn't make it not true.