I don't really feel like there is a large number of parties in Norway when arbeiterpartiet wins 35% of the vote every time and Parliament switch between them and the conservative party. And this time around the farming party really decided to screw things up for the coalition. But I suppose this is better then the republicans and the democrats for (insert whatever reason you want here).
Having many large political parties and a trend of (almost) always having minority governments also help limit possible damage.