At 60fps that's 6 frames, which is plenty. That aside, I feel the reason is to advertise the feature so that the user gets a chance to set the timer up to his preference or disable autocorrect entirely.
6 frames is not enough to realize you made a typo / read whatever git is outputting telling you that you made a typo, and then respond to that input correctly. in video games it may seem like a lot of time for a reaction, but a lot of that “reaction time” is based off previous context of the game, visuals and muscle memory and whatnot. If playing street fighter and say youre trying to parry an attack that has a 6 fra…
git good.
(the parent post was a set up for this)