https://www.test.de/Apple-iPhone-X-Das-zerbrechlichste-iPhon...
(German Consumer report: iPhone X is most brittle of all iPhones)
It looks like they dropped a single phone, and you didn't even get to see how it fell. Hard to say that's definitive.
https://www.youtube.com/watch?v=8vHCBwJVeO4
I've dropped my case-less iPhone X 5 feet onto bathroom tile and not even a noticeable scratch afterwards.