When I was growing up, skiing in CO and NM, I never heard people saying "black diamond" or "blue square" or "green circle." We just called them blacks/double blacks, blues, and greens. It was just redundant to say the name of the shape, because there was no such thing as a black square or green diamond.
Fifteen years later (haven't skied in America since about '96), everyone's saying "black diamond" and so on, even my brother, who never used to say that. What's up with that? Am I the only one who thinks it sounds a bit silly?
Honestly, 15 years ago, it would have been the type of thing I'd expect to hear from someone in jeans and a Starter jacket who was trying to impress his friends.
The only reason I can think of to make a change would be for the benefit of color blind people. But then, why say the name of the colors? Why not just say the names of the shapes?
Has the whole western hemisphere gone gapetastic?