Let's not forget that some of the polish (Never Never Land, Roseland) is from glaciation, not climberation
That's an issue I was wondering about. (Not sure how you tell when it's the glacier versus when it's climbers).
A related question is whether the slippery surface just off the ground on the direct start to Black Fly (a.k.a. Nice Crack Climb) is the result of dirty climbing shoes or just high quartz content in the rock.
Ken