Hm. To me, reaching uncanny valley means they're probably quite close in form and behaviour. But it may well be the case that the remaining 1% (or whatever the percentage is) of the details may be harder than the first 99%.
I can see your point. But to me, the uncanny valley isn’t evidence that we’re super close, it’s evidence that we don’t know how to fully define the problem because there are elements we know are not wore right but can’t say why. Because we can’t fully define it means we aren’t close to solving it.
The other examples appear to me as magnifications of mental illness instead of generalizable scenarios, possibly including the Google employee when you consider his background.