Earlier quoted context omitted.
A 120ms should feel immediate. IIRC anything under 300ms feels instant.
That was a bad post. The figure of 300ms was from memory. I guess it's complex but for games shmup games ( https://www.pubnub.com/blog/how-fast-is-realtime-human-perce... ): " ...for Massive Multiplayer Online Gaming (MMOG), real-time is a requirement. As online gaming matures, players flock to games with more immersive and lifelike experiences. To satisfy this demand, developers now need to produce games with very r…
Not really, unless you're the kind of guy working in Cobol and who is used to typing with latency.
I've seen Cobol developers just ignoring the latency, keeping typing because they know what they've typed and it doesn't matter that it's slow to show up on screen.