Ixchel-I am married to an man with classic ADHD-got diagnosed late in life and can tell you that what you are saying is the absolute truth, I agree. I would be interested in your article and research when it is published.
elpark-I would also agree with you on your research. However, (I can't know first hand about France so won't make assumptions) but in Germany, the UK, and other EU countries many of children who are found to have "behavioral issues", "mental issues that cause disruptions", "learning disabilities" etc can be streamlined out of the general education system early on and put into other schools.
I guess I am saying we need to look into the whole culture, beliefs, education system, medical system, etc before we start comparing one country to another and making an assumption that one is better than another-not to say that is what you were doing but I definitely got that feel from the original article itself.