So i had the shining on while i was modding (just hearing not watching, eyes on burning hot solder!). And I hear Jack typing away, man he musta been doing 10 words a minute, 60chars per second. Either it's cuz of the hunt and peck method associated with those old school return carriage or that it takes like 200force to activate a button. Maybe thats why you had the IBM clickclacks come out, cuz ppl were used to the sound. (or you know use the sound=1 key press so type faster type thing)
But man how did ppl write back then? I mean I can pour out my thoughts on keyboard almost as fast as I talk, I think i'd loose my train of thought with an old school typewriter. (prolly not a more modern one like a selectric)