My understanding is that the "parsing the screen" step is slightly pipelined with the "typing the keys" step, as the labels you have to read/pick between show u

My understanding is that the "parsing the screen" step is slightly pipelined with the "typing the keys" step, as the labels you have to read/pick between show up after you've typed the first character of the pair — so in the ~300ms it takes you to type the second character, you've already become aware of the labels, and are well on your way to parsing them.