The only measure the user cares about when it comes to snappiness is input-to-display latency, and the whole point of my comment was to be realistic about it. A chat app won't hit 16.6ms latency, but it doesn't have to. 100-200ms is realistic and perfectly fine, and if you don't manage to hit it, something is seriously wrong with your application.

And yes, of course, something is seriously wrong with a lot of applications these days, otherwise we wouldn't be having this conversation at all.