I don't know about the rest of you but I have that confidence meter already built into my mind. When I play bad, missing 10 foot putts, late on the meter and so forth it is pretty much like that the whole round. But when I'm on, I'm on. Pretty much the same way it is for me when I play real golf.
One bad shot can rattle nerves and confidence. Some call it WGT gremlins not letting you score like you should. I call it brain farts.