Holt, in Learning All the Time
provides his own anekdotal evidence:
he used to write in cursive, and was convinced that he was the fastest speedwriter around. then in one of his classes he had a friendly competition with his students, and one or two were faster than him, despite his best efforts.
since then he timed himself numerous times, and he consistently had better results with printing. not statistically significant, but still faster. even though he was used to cursive.
his reasoning was that we move the pen faster through the air, then on paper, so printing is faster.
also, printing is more legible, as the connections between letters cannot be confused with the letters themselves.
so he decided to switch to his modified version of printing, at the age of 40 something, except for his signature.