The hand is faster than the ... uh ....
A school for the blind in Ekaterinburg ran an event called Total Dictation, where a group of older and younger Braillers competed to keep up with vocal dictation.
Note how her left hand serves as the 'visual' tracker for the right hand. Impressive skill and beautiful working hands.
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Working under time pressure is an important part of experiential education. After you've hit the plateau of basic skill, speeding up is the best way to reach full mastery.