I don't disagree with you in general and I find the lack of focus on latency very frustrating (though the proliferation of 120hz screens seems to indicate that there's hope)

But with regard to the Dan Luu post I've tried to recreate his findings and maybe things have gotten better because with 170hz monitor and a run of the mill gaming keyboard I'm getting keypress to photon latencies in windows gVim of about 35ms as measured with a high speed camera.