All but about a dozen?
How the hell would you measure that? The most extreme testing stuff I've ever heard of can't get you anywhere near that much information. If you could get definite information that you were at the 1-in-1,000,000 level, that'd get you into the top seven thousand and change. And the thing is, we can't get accurate measurements even that far out.
Once you're to "the test can't produce meaningful results anymore", you're done. You might be way smarter than other people with that trait, you might be on the stupid end of the pool, we don't know, we can't tell, we have no way to measure it.
We don't know. He does. He's a genius.