you don't know that qwerty was created to actually slow typists down

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That is almost certainly an urban myth. The QWERTY keyboard was designed to minimize the number of collisions between hammers. Anyone who has actually used a mechanical typewriter will tell you that the hammers that tend to jam are the ones that are closest together. I'm guessing because there is a bigger region where the hammers try to occupy the same spot since they are running along roughly the same line. Anyway, the point is you reduce the collisions by separating the hammers. You don't actually have to try to slow the typist down by mechanical means anyway, since that is self correcting (i.e. too many jams, just type slower).