I completely agree to both you and ukas. They've been sloppy with their testing for a while.
And seeing how the Leo Bodnar test doesn't support HDR or 4K, then how is RTings getting their input lag numbers? Your guess is as good as mine, since they don't detail their testing method for this. And considering RTings is the only website publishing 4K + HDR input lag numbers, I'm going to ignore the results. I'll wait for the calibrators & AV community to give us numbers that I can trust.
That sure sounds sloppy to me. If you can't get a scientific reading from one instrument, then it's ridiculous to not use another testing method to get true results.
You'd think, right? Nowhere do they publish their testing method(s) for 4K + HDR. See my rant above.