I'm not sure if this is Hacker News, but the linked author isn't talking about the study's findings at all. He just uses it as a springboard to rant about a few mothers so bad they got sensational tabloid headlines. Then he works in a few predictable jabs at the welfare state for producing parasitical monsters.

This may be the study that the author is discussing, although it was released in 2007.

http://www.unicef-irc.org/publications/pdf/rc7_eng.pdf

Hopefully, anyone on this board isn't afraid of real data. The picture seems kind of mixed and even the authors find it difficult to pin down the exact sources of well-being.