Some more nerdery. First, the relative strength of the left wing in elections since the introduction of proportional representation in 1918:
The weakness of the Social Democrats shows – the party’s performance in the 2005, 2007 and now 2011 elections is historically bad. Interestingly, the parties to the left also have problems picking up the left wing vote: In a historical comparison, 2011 is still worse than anything since 1926. On the other hand, the left wing viewed in isolation had a fairly good election with 2011 ranking with the elections of the 1980s.
Next, fractionalisation. There are endless ways of measuring the fractionalisation of a party system (I will point you to Claus Dahl for a matematician’s take). Using the distribution of seats in the Folketing – excluding the North Atlantic MPs so the denominator is 175 – I get this with the Rein-Taagepera formula:
For the record: Claus and I reach the same conclusion – the present Folketing is the most fractionalised since 1981-1984.