I do want to point out that, in the poll, monogamists and serial monogamists combined (slightly) outnumber polygamists. We might be enabling one another for vicarious pleasure...
Me and one other person here are philanderers! And unlike in real life, nobody gets hurt! I have a serious roving eye when it comes to skis.
That's why this level 1-9 business is a little off. Because there are a lot of great skiers out there. I have no idea what level I am and frankly don't care. I can hold my own and can hang with others. I read Keystone's rating and thought okay, I'm probably a level 8. And , what's a moderate bump run? Most in Tahoe are considered black or double black so there is no moderate bump run... Does that make me a level 9 because I ski bump runs that are not moderate? No way. I'm probably a level 7... Ha!
It's definitely off. And people bring their own preconceptions. I think a lot of us (definitely me) went through a phase at some point when we thought we were much better than we were on an absolute scale. We either thought "Hey, I ski expert skis, so I'm an expert!" or "I ski black diamonds, so I'm an expert!" or "Well, nobody but extreme skiers ski that other stuff, so I'm an expert!" ... I called myself an expert when I was a solid intermediate. These days I'd have trouble calling myself a true expert, and likely never will.
The ratings are just a way to attempt to get people together who have similar interests and skill needs. And as long as that part fits together, it's all good.
Also, as you move up in skill, the levels necessarily represent a broader band of skill and terrain abilities. People spend more time at each level. A low level eight and a high level eight will typically ski at a very different pace on challenging terrain. The high end of level nine is unlimited - Angel Collinson and Bode Miller would have to be level nines, because there's nowhere else to put them (I mean, in theory. They get coaching - at least Bode does - but I doubt they're showing up in a lesson line).
I know an instructor who is pretty "secretly open" about rolling his eyes at how walk-ups assign themselves lesson levels. He is always nothing but respectful to the students in his class, but if you get a few drinks in him, he'll readily admit that his 8s were maybe 6s, etc.
Anyway, way off topic, but yes, there is no way for 9 levels to encompass the world of skiers, or for skiers to really do a good job of rating themselves. And there are disincentives for instructors to point out that a full group of "eights" are really "sixes." It's easier and nicer to just go along and at least not correct them when they say they're in an eights lesson. I remember how hurt I was when I joined what we called an eights lesson years ago, and then the instructor posted video and called it a seven in the video. In retrospect he was completely correct, and I even wondered about it during the lesson, but it still bruised my ego. It really only comes up when people have vastly different conceptions. This was an issue on a powder day last season - a friend who is an absolute beast on skis and a true nine by any measure showed up for a lesson. An instructor who has a "usual crew" that call themselves nines, do ski very well and some very tricky runs, but are on the whole quite a bit older and much slower, was there. The main reason anyone was there for a lesson that day was obvious - ski powder, lots of it. So the supervisor tried to put my friend with the nines group, which made sense on paper. A very senior instructor intervened and made it clear that my friend was *not* a good fit for that group, and told my friend that if he was forced into that group, he should go back to the ski school and request a refund as they weren't able to give him the instruction he needed. Long story short, friend ended up grouped in a "private" with an instructor who could actually keep up with him and was happy to get a group.
Now, you might argue that the point of a lesson group is entirely to learn, and that as long as the instructor can give you some pointers, you should be okay going slowly. But I think that if a ski school took that approach, particularly for very skilled skiers on a powder day, they would get a lot less non-holiday business.