Conclusion: "Unlike claims by either keyboard or mouse advocates, when I do experiments myself, the results are mixed. Some tasks are substantially faster if I use the keyboard and some are substantially faster if I use the mouse. Moreover, most of the results are easily predictable (when the results are similar, the prediction is that it would be hard to predict). [...] This result is so boring that it would barely be worth mentioning if not for the large groups of people who believe that either the keyboard is always faster than the mouse or vice versa."
Conclusion: "Unlike claims by either keyboard or mouse advocates, when I do experiments myself, the results are mixed. Some tasks are substantially faster if I use the keyboard and some are substantially faster if I use the mouse. Moreover, most of the results are easily predictable (when the results are similar, the prediction is that it would be hard to predict). [...] This result is so boring that it would barely be worth mentioning if not for the large groups of people who believe that either the keyboard is always faster than the mouse or vice versa."