Nothing specifically Dark Ages about this. I think that's true with many fields. It's the theme of the child prodigy. A painter, a violinist, an athelete would all be given special notice if the excelled at these skills at a young age. One would expect an excellent engineer to grow up playing with legos or building toy bridges.
Perhaps this is a practice that doesn't do us any good, and should be done away with, but it is not at all limited to programming.