I'm really sorry, you're right: nvidia's docs are NOT out of date, they're completely correct, my fault.
But I really liked to have ANY statement regarding to my (and not only my) problem.
You're really fast in correcting any misleading or simply false statements, but I could not find any comment on the actual problem! - does that mean NVIDIA is aware of the problem or is not aware of the problem or ignores it or works on it or ... - what?!?
You said "And AFAIK, the driver options are all still implemented."
Does that mean they still do not work? - Maybe that's the reason I can't enable Fast Writes?
Can the disabled Fast Writes cause these performace losses?