Even if US labs are currently in the lead (which they are), in the hypothetical scenario where we're close to AGI, it wouldn't take too long (years - decades at most) for other people to catch up, especially given a lot of the researchers etc. are not originally from the US.

So the stated concern of the west coast tech bros that we're close to some misaligned AGI apocalypse would be slightly delayed, but in the grand scheme of things it would make no difference