@Humpleupagus @RustyCrab reaction time business is totally misleading because it's based on reacting to something you can't predict. the classic thing people do in school is having someone else drop a ruler through your fingers, and you're supposed to clamp on to it, and how far it fell shows how long it took for you to react

but the brain is exceptionally good at predicting timing if it can anticipate when something is going to happen. pressing a piano key may have some latency because of the mechanical components, but the brain simply presses the key slightly earlier to get the sound to happen at the right time

even if you switched to a different piano with significantly more latency, as a skilled player you'd be able to adjust very quickly and play well