"'Keyboard shortcuts are faster' is a myth" is a myth: In 1992, Tog wrote:

The test I did I did several years ago, frankly, I entered into for the express purpose of letting cursor keys win, just to prove they could in some cases be faster than the mouse. Using Microsoft Word on a Macintosh, I typed in a paragraph of text, then replaced every instance of an "e" with a vertical bar (|). The test subject's task was to replace every | with an "e." Just to make it even harder, the test subjects, when using the mouse, were forbidden to just drop the cursor to the right of the | and then use the delete key to get rid of it. Instead, they had to actually drag the mouse pointer across the one-pixel width of the character t o select it, then press the "e" key to replace it.

The average time for the cursor keys was 99.43 seconds, for the mouse, 50.22 seconds. I also asked the test subjects which method was faster, and to a person they reported that the cursor keys were much, much faster.
I have just duplicated Tog's experiment, also using Microsoft Word on a Macintosh. I used a 94-word sample and timed myself with Minuteur. Using the cursor keys took 93 seconds; using the mouse took 239 seconds.

Tog's research is at least 20 years old. It may have been relevant when keyboard shortcuts and computer users were both less advanced than they are now, but those days are gone. And yet the estimable John Gruber linked to Tog's column last week, as though it were something for contemporary users and developers to keep in mind. Someone cites it in a comments thread here. Squelch this revaunchist nonsense before it goes any further! Keyboard shortcuts work!