Additionally, it would have been interesting to hear where the respondents fall on the moral matrices, of which Haidt --who is leveling the assertion that conservatives are less common-- is a proponent.
For those who haven't heard of Haidt's ideas, I highly recommend checking out his book The Righteous Mind: why good people are divided by politics and religion.
I highly recommend anyone in a similar situation read Jonathan Haidt's book "The Righteous Mind: Why Good People are Divided by Politics and Religion."
Haidt is a psychologist who studies moral development, and while I don't believe everything he puts forth in the book to be gospel, he makes many good points about how people come to moral conclusions (which may not be logical conclusions, but nonetheless are based on what the person uses their senses to believe is true).
For those who haven't heard of Haidt's ideas, I highly recommend checking out his book The Righteous Mind: why good people are divided by politics and religion.