Fun fact: the Twiddler was a mainstay of Thad Starner's wearable. (Thad was the tech lead behind Google Glass.) Thad had pretty impressive WPM on a Twiddler...

Fun fact: the Twiddler was a mainstay of Thad Starner's wearable. (Thad was the tech lead behind Google Glass.) Thad had pretty impressive WPM on a Twiddler... 80-90 WPM IIRC.