I think you completely hit the nail on the head,
@lonewolf210 . We are producing conditional statistics here. What kind of a freak spends time on a skiing website? Well, thank you for asking. A ski freak. So, among this crowd, being a level 7 or 8 is standard. But most of our forum members have a keen interest in skiing. Very many are instructors, for Pete's sake. And very many ski 50+ days a season, while many find way to ski year around. So, among that population, it's actually surprising that the average isn't higher.
An unconditional poll (where ski participants are polled at random, no matter whether they ski 100 days a season or just on a long weekend, once a year), would be tremendously biased towards the front.