Low input latency irritates you? That's a new one.
It threw them off for the first few hours, as written. Doesn't mean that low latency in general irritates them, just that they weren't used to it at first.
I'm a gamer myself. Upgrading my display makes me slightly off-game myself, until I get used to the new one. Same when getting a new car, where the brakes are way more sensitive than on a old car. Doesn't mean I don't like the brakes to be more sensitive, just means I'm not used to it.
And yes, the first few weeks of sensitive brakes are irritating, just touch the pedal and the car grinds quickly to a full halt. But now I do like it better compared to when you fully press down the pedal and the car slowly stops.