In reply to Frank the Husky:
> Why does it go from E1 to E3 for doing it all at once?
Good question. Starting from the premise that most grading systems in climbing use as their basis a scale which declares the fraction of the climbing population that can climb a route (i.e. that if only 1 in 10 climb can climb route A, but 3 in 10 can climb route B, then route A is harder than route B), many climber can do wonderland over several weekends, but far fewer in one day, so we have two different grades.
Looking at who of my 12 partners fell off during the first ascent, and what it felt like to me, we came up with E1. But I can't imagine an E1 climber could do it in a day, hence the E3. It will be interesting to see who does it in a day and what grade they climb.