Clearly NZ isn't marketing itself to the rest of the world quite the same way it is in Australia. If you say New Zealand in Australia, skiing is pretty much the first thing that comes to mind, but it's the least guessed answer here.
There are ski resorts outside of the Alps in Germany most noteably in the Black Forest, the Erzgebirge, the Bavarian Forest and the Sauerland but these resorts are rather small with only a few ones having more than 5-10km of slopes.
I agree with brettski. The problem with measuring by distance of runs is that what counts as separate runs is subjective. If there's a large, open bowl, as there often is at ski resorts, how do you classify that as separate runs?
Wow! Surprising that Slovenia isn't there, don't know if that's just me being stupid but I'm pretty sure they have a few resorts there. France and the US are tight, would of thought France would have slightly more but there we go!
I think this quiz could be updated once again, some countries are improving there ski fields very quickly and may appear in this top : bulgaria, montenegro, andorra, china, kazakstan for example.