“For more than half of my life, Scotland has been governed by parties we didn’t elect at Westminster..” Alex Salmond

Well, it’s been some time since Scotland voted for a single party in significant numbers to say “we” elected them.  In the 1950’s over 50% of the vote went to the Tories.  I assume that Salmond is counting the Labour government of the late 1990s to 2010 as part of the half when Scotland was governed by parties “we” did elect, but during that period, Labour polled only just over 40% of the popular vote in Scotland.

During the Blair era, Labour were elected on rather less than 40% of the popular vote in the rest of the United Kingdom.

It is possible to argue that, Scotland tends to do rather better than the rest of the UK when it comes to electoral maths.

The current coalition government received about 35.6% of the Scottish popular vote in 2010.  That’s as compared to the previous Labour government in 2005 which received 42% of the Scottish popular vote and only 35.2% of the UK popular vote.

This is a reason for rejecting the first-past-the-post electoral system, not for abandoning the Union.