I was thinking about this phenomenon today. Digital clocks are so common now that I don't often need to read an analog one, much less in a hurry. I worry that I'm losing the ability to do so. (The worry is a little bit because I might still need it at some point, and much more because being able to quickly read analog clocks makes me feel like a grown-up.) In particular, when I am called upon to read one, I'm embarrassed by how long it takes me to do so. It's only several seconds, but that's enough to make it clear to anyone watching that I had to stop and think about it.
But then I caught myself, and thought, wait a moment. Am I actually much slower at this than I used to be? Or is reading an analog clock really just a noticeably slower action than reading a digital one? This is intuitively plausible; it has more mental steps. Rather than comparing my current analog-clock-reading speed with a previous one (which I don't really remember), I'm comparing it to my digital-clock-reading speed, which doesn't make sense. I was going to ask how you'd design an experiment to test this. Then I remembered that not everyone is young enough to have to speculate about what it's like not having mostly digital clocks around. :P So if you're old enough to have significantly more practice reading analog clocks than digital, how long does it take you to read one? Is it noticeably longer than reading a digital clock? If you aren't, and have a significantly different experience from mine, I'm interested in that too.
A few minutes ago I would have agreed with this, but now I'm not so sure. It seems like there are people who represent time in their heads in a way which is more similar to an analogue clock (breaking it into chunks, thinking of before/after an hour), and such people might always prefer them. One could argue that that kind of thinking is the product of a culture that still uses analogue clocks, and therefore it'll go away as digital clocks come to dominate, but I think that perspective is also reinforced by some common language constructions ("quarter of an hour," "it's ten of") which will be harder to get rid of. Not to mention the fact that, if digital clocks aren't preferable for everyone now, there's no reason that they'll become so dominant as to start that snowballing process.