I don’t have any doubts that this is true. All the fps in the world won’t help you if the game itself induces nausea. However there are multiple factors here. It makes a lot of sense that latency induces nausea, if your eyes keep staring at the same frame for too long while you’re brain is expecting movement, then this mismatch will induce nausea. This definitely is a factor, question is of course at what framerate this is ‘solved’.
Do you have any reference for this claim? Like I said if you google DK2 vs CV1 you’ll find that a lot of people reported less nausea after switching their DK2 (75 hz) for a CV1 (90hz).