I've seen some of the articles about the Nordic countries and was not conviced at all. They were saying that in Nordic countries women have more choice and they have a lower participation in CS studies. And bang, they thought they proved something...
Rather than accepting no evidence, why don't you suggest a better way to test this idea and explain why your test would be better?
There is nothing wrong in saying that we don't know if coffee is good or not for your health. Science is not there yet with its tools to test for this. Instead of presenting studies over studies that contradict each other.
The same with inherited differences between genders. Science is not there yet to tell us anything about it.
Correlations without context are useless, though: http://tylervigen.com/spurious-correlations