You might have seen this but as far as I understand it this is properly researched at Lancaster University:

    "On a party-by-party basis, the average (childhood) IQ scores for 2001 voters were:

       Green - 108.3

       Liberal Democrat - 108.2

       Conservative - 103.7

       Labour – 103

       Plaid Cymru - 102.5

       Scottish National - 102.2

       UK Independence - 101.1

       British National - 98.4

       Did not vote/None of the above - 99.7"

My point is you're not dealing with "average" folks..........

Paul