Most of the article was the author writing about her own personal experience, and she appears to have but one child, a daughter. The other examples seemed coincidentally (to me) also to be about daughters. So I suppose no.

But if it makes you feel better, I have a son whom we raised this way and he is the same. This was also how it worked at school, at least in Vorschule and Grundschule. That could be a German cultural thing — the US seems to have that kind of thing backwards.