Reply #18: I don't think so

[bananas]

This particular group of researchers seems to focus on a hypothetical left/right gene, not "leader or follower".

Here's a NYT article from last year about them:
"Many people who are genetically conservative may be brought up as Democrats, and some who are genetically more progressive may be raised as Republicans, the researchers say."
http://www.nytimes.com/2005/06/21/science/21gene.html?ei=5090&en=dde7d8feedd2f87f&ex=1277006400&partner=rssuserland&emc=rss&pagewanted=print

and here's a quote from the "Genes and Ideologies" paper mentioned in the OP article critiquing these folk:
"I then question the cogency, from a historical and theoretical perspective, of proposing the existence of “liberal” and “conservative” “phenotypes” and “genotypes.” My argument has implications beyond the findings of Alford, Funk, and Hibbing, ..."
http://www.pubpol.duke.edu/research/papers/SAN06-07.pdf