Information where to find the article, a critique ("the left, the right, and the rigid") and a response to the critique

The main information missing in the short article Amos has linked to are the effect sizes. In a meta-analysis using many data even very small effects can be found to be statistically significant.

Are the differences so big that looking at a person you can with some certainty say this person will become conservative later or are they so small that they can only be detected in large samples?

If a certain trait, can be seen in, say, 412 of 1000 conservatives, but only in 387 of 1000 liberals, you'll find the difference significant when looking at 10000s of them. Statistically significant, but it is significant in the everyday use of the word?

Perhaps yes, but I haven't read the original article yet so I don't know.

Wolfgang