Yes. To me, it suggests delicate, and also elegant and well cared for. Remember also that, for most of history, ordinary people did manual work, which made their hands rough, red, etc.
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I, too, have been told by an aristocrat that long fingers was a physical trait on the breed.
Members of the nobility did not labor, so they rarely (if ever) injured them. This means that they would grow to their genetic potential.
Compare that to a peasant youth, who would likely bump/crush/tweak their fingers multiple times over the lifespan, which limits growth. Also the difference in mineral intake. Also the difference in stress load.
Aristocrats to this day