I'm not sure what you want to say with this link. Do you mean that for you the differences between WEIRDos from US and Europe are small ones?

In most any not-too-big group, and a nearly infinite set of dimensional data to compare, shouldn't one be able to come up with a list of dimensions for each specimen (i.e., country in this example) in which that specimen exceptional in some statistical analysis?

With a good amount of American exceptionalism thrown in...

I can't really analyze it one way or another, but selecting the acronym "WEIRD" sure doesn't help their case against Narcissism of small differences.