RDM is affected by latency, but i wouldnt call it crippling.
The only time my GCD really suffers, is when Im working with a NIN, trying to get embolden off, usually resulting in triple weaving (aka clipping)
Of course If I pop it too early, then a lot is wasted, and if I pop it when its going to cause less clipping, then Im doing it late enough someone claims im being selfish with it.
Though double weaving easily cuts off at LEAST 0.1s off my GCD.
But it depends on the night.
And I wouldnt call it crippling.
