[dkbrk]

Like many others I didn't originally learn typing in a structured manner. It used to be that I only ever used the left shift key. This works adequately, but means that when holding shift the finger positions for the left hand change. In short, it's a bad habit that hampers accuracy and speed, and may increase the risk of RSI.

A couple of years back I made a concerted effort to learn the dvorak layout and have since become a fairly proficient touch-typist. Consequently, when I use a shift key I always use the hand on the opposite side to the one hitting the letter. My coordination is now good enough that I can type a sequence of capitals quickly and accurately using just the shift keys -- alternating to each side as required -- but that would be silly. I don't even think about using Caps Lock, now, it's just part of my muscle memory for when I type a sequence of capitals.

I suspect that most people who don't see the use of Caps Lock always use just one of the shift keys and hold it down when typing a sequence of capitals.