No thanks, Bob. Not taking your bait.
Mustski - you said above that the system is designed to keep people from getting in over their heads. I can't agree with that. The only "progression" that is apparent is green > blue > black. The lack of further definition is exactly what gets people in over their heads when they don't realize or understand which are the "hard" blacks vs which are the "easy" blacks. The fact that I hear skiers all the time adding easy/hard descriptors to both blue and black runs makes me certain that the current system isn't adequate. If the system was adequate nobody would ever have to say "that's an easy black". It would just be - that's a black. Period.
As someone who would classify a black as "easy" or "hard" - let me clarify. At Mammoth - I will not ski double blacks. I can see they are too hard for me. There are three black runs that are variable depending on conditions. Cornice is a groomed steep and is always "easy." Scotty's is variable depending on if the run is bumped and soft or bumped and hard. Early in the season it is groomed and much the same as Cornice. This is the nature of skiing- eyes open, check it out. Someone like myself who can ski bumped and soft but not bumped and hard, is going to ski a groomed run first to check conditions. That allows me to extrapolate whether or not to try Scotty's today. On no day is Scotty's equivalent to a double black. On any day, I can ski it. I just may not enjoy it. If someone is challenged by blue runs at a particular resort, they should approach any black very carefully. It's a relative system that gives us enough information to stay safe. That's all it's meant to be.