I tried to follow his advice for a while but didn't ever notice a perceivable difference between, say, st and alacrity. I think the justification for why we care about latency, there, is a bit fuzzy -- the examples he provides are about stylus inputs, the feedback loop there is more direct and there's more physical experience. I can't tell you what you feel of course. Currently I use kitty. Perhaps I'm blessed by unusual latency insensitivity....