I don't notice any typing latency on Slack and I'm usually pretty sensitive to it. That said, Atom with a bunch of plugins can chug a little.
But I do notice latency in hyper.js, and it just makes it feel very "dull", and that's what I think a lot of people know of electron terminals
plus the competition from native apps is a bit absurd in terms of performance, with most of the serious ones either rendering asap or on the next frame (when vsync'd)
I would of tested this one, but no windows build, and I'm not using a linux install atm
editors don't roundtrip to a separate application through multiple buffers (bash, zsh, fish, or whatever) to decide if they need to show a color or letter or nothing