In reply to felt:
> Of Grammatology is either an ED3 or.
... or?
Does that make War and Peace a TD+?
In reply to Kahti:
> On a serious note grades for backcountry skiing would be cool, as using winter gulley grades doesn't really translate. Something similar to trad grades taking in both technicality and exposure would work. Have a big wide black run as a start grade (Vdiff) and go up from there. Alladin's Gulley would be a good HVS 4c equivilent - the "now your getting serious but not too technical" grade, and something like Tom Burt's classic line on Cordova Peak or some of Andreas Franson's lines in the alps probably sets the high end of the Extremes!
I hate to break it to you, but we've already got one of those... the Toponeige scale is a pretty accurate way of judging a descent, in my opinion.
However, not being a very good climber, I can't translate the numbers that I do have experience with (towards the upper end, but nowhere near the end of, the Toponeige scale) into the ones that I don't, so I wouldn't be able to suggest that 4.3 E2 as being like a F7a, or that rather spicy 5.3 E3 as pushing the same buttons as an E6 6b... especially seeing as I have even less knowledge of British grades, having not climbed outdoors in the UK since I was about twelve.