I believe that Jack's post was agenda-driven crap.
I do not believe that the news piece can be taken to be the study. All of the detractors, including you, are pretending that they know what is in the study. That, for example, the only statistic quoted in the piece (that .27 correlation that is grabbing headlines and inspiring shrieks of horror) is the only statistic in the study.
I am telling you that an experiment designed to use standard (I assume, without reading the study) screening techniques on pre-schoolers, and then comparing the results to other standard measures of outcome (like political affiliation) years later, is a valid design. I would like to see the study, but I can't find it on the net.