Who knows? Maybe intelligence can be tied to handedness, gingerness (heaven forbid!), or body symmetry. A tricky thing to measure given difficulties in testing, lack of twin studies, and the like.

Admittedly it would be interesting to take a million people, give them various sorts of cognitive tests, do a DNA sample, feed in biographical details, and let 'er rip on a big ol' computer. There might be outrage and a need to twiddle knobs on the AI or there might be nothing noteworthy. Some Chinese researcher will let us know soon enough.