They are visible, but they do flicker heavily depending on camera's distance to the wipers for me.
In other words, when standing still, the wipers become visible at -125/0. They are invisible for me with any seat position from -124/0 or greater. Because I'm usually driving at -100/0, they become visible when accelerating (because the helmet "moves" backwards) and disappear again under braking.
I've noticed this in the 370z. They are visible, but if i move my head down a touch, they completely disappear from view. Move my head up a touch and they come back.