http://www.psychologytoday.com/blog/suffer-the-children/201203/why-french-kids-dont-have-adhd
The whole thing is reminiscent of this book which my wife purchased and neither one of us ever read. I really need to pick it up again (find it first) because we're getting to the point when our son is expressing his opinions, usually in the form of crying out. This link is for the audiobook, which could be the solution to my never having a chance to read.