For a programmer, words-per-minute text typing speed is not so important, but navigation typing speed is. I'm talking about the ability to, without conscious t

For a programmer, words-per-minute text typing speed is not so important, but navigation typing speed is. I'm talking about the ability to, without conscious thought, tab around between windows, hit the command keys for operations like copy+paste, and use speedy text navigation shortcuts like Ctrl-arrow keys and Home/End. The more a programmer can instinctively take shortcuts like that, the more he'll maintain mental flow on the real task instead of diverting effort to managing his tools. I don't have any hard data of course, but anecdotally I feel a large correlation between environment navigation efficiency and work productivity. This applies to more than just programming, like spreadsheet work as well. A user who's learned End-navigation or fill-down shortcuts can get a complex Excel sheet done in significantly less time.