@gamingonlinux That's an oversimplification. Reaction time is what you can measure from a binary signal that can happen at any moment. But most often what matters is timing precision alongside a continuum, such as when aiming. When I play the piano with a playback latency of over 40ms, I play very badly (esp. if I have to follow some rhythm), even though that's 5 times less than our reaction time. It's about expected times, not unexpected ones.