They have it in Denver but it appears to be meaningless. They still have an elite security line and a single line for regular passengers. After TSA has checked your ID (I love the way that they stare at it for 30 seconds and then bring out the magnifying glass ) then you go to whichever lane is shortest/closest. I just happened to notice the ski slope designation at that point, but I don't think anyone notices or cares.

One bad thing is that there is no dedicated lane for security. After ID check the regular passengers merge over to the lanes closest to the elite security, which happens to have the black diamond. I have even seen it back up the elite line from moving beyond ID check.