The delay in between typing and seeing it rendered, drawing large portions of text (which matters if you spend a lot of time in term based editors) etc ...
It's very subjective: some folks (me included) will notice the difference and feel frustrated if it's not fast enough, while others are scratching their head about how it actually makes a difference.
It could also be said, that it's of logical to expect certain things to be fast; especially when they've been around for so long. We're drawing text on the screen here, it should be fast.
Saying it matters with anything else than feeling/comfort would be overreaching.
It's very subjective: some folks (me included) will notice the difference and feel frustrated if it's not fast enough, while others are scratching their head about how it actually makes a difference.
It could also be said, that it's of logical to expect certain things to be fast; especially when they've been around for so long. We're drawing text on the screen here, it should be fast.
Saying it matters with anything else than feeling/comfort would be overreaching.