In reply to alx:
> So either it's 8C and Dave's past ascent are on the grade or it's 8B+ and his past efforts in Magic Wood are all soft/inflated grades.
I suspect it's alluding to the well-known elephant in the room that the two work on a slightly different spectrum. All in all, an incredibly modest but well-reasoned decision on Dave's part, as far as I can tell.
It looks like an immense piece of climbing. Can't wait to see the video of the final thing.