My guess is that is with "bursting" and is not very sustainable. Not to mention, being able to type so quickly is very impractical when you need to think about

My guess is that is with "bursting" and is not very sustainable. Not to mention, being able to type so quickly is very impractical when you need to think about what to say (well....type) and with programming especially, typing speed is irrelevant. To give a comparison - I can type 700~ cpm steadily, which means I can maintain it for large periods of time. Only practical when copying text when OCR fails me or when doing data entry. With "bursts" (unsustainable but rapid typing) I can type 160-170wpm with a negligible error rate (<1%) but I can only keep it up for a few minutes. Realistically, I type closer to 110-120wpm, because I take longer pauses between words while I consider what I am about to say (again....type). My hunch is the author actually meant 800cpm, but I do have my doubts to the accuracy or susustainability of the figure. It isn't "impossible" but it is "The top 1% of the top 1%" levels. :) http://i.imgur.com/NW2Kq4p.png http://i.imgur.com/NW2Kq4p.png