Back to the topic, sorry for not having answered before
Two words on the french high education system
Basically, once you have passed you final exam (the "baccalauréat" which is more or less a A level I assume) you can either go to the university (which, in France whether it is very prestigious or not - and it can be: eg. Sorbonne (literature, philosophy), Assas (law) is free, or at least not expensive at all), or you choose to go to the Grandes Ecoles (think the Ivy League, I think you can compare them). But, in France, there is an exam which a number of students accepted, no more, and you have to prepare it VERY hardly, because even if the french schools' reputation is not as good as, say, Harvard, enter in one of them is MORE difficult to be accepted in Harvard (which is strange and probably stupid, but that's it! think some schools only accept 8 students per year when more than 3000 are preparing the exam). Bla bla bla. After those two years, you attend the exam. In france we have two very prestigious Business Schools: HEC and ESSEC, HEC being a little bit more prestigious but that's not important. And whereas in most of the countries, even if you're not from a very very brillant school, you can manage to get on the top of the top, it's nearly impossible in France: almost every CEO or high executives are from these two schools (+ some prestigous engeneerer schools - "Polytechnique") so...
So yes, this is very trustable. Note the HEC also does something in the luxury management
http://www.hec.fr/hec/eng/fashion-luxury/ (it's mainly aimed to the people who wants to work in Asia I think...)
Also, these two MBA are not the traditionnal ones, the ones you can attend after the exam. I assume you have to work a lot in the luxury industry before... Not sure though. Anyway yes, this is very trustable (+ France has the strongest reputation concerning luxury industry - it's the only one haha so it's important
)
Just a work concerning politicians. No, almost none of them are from business schools (exept socialist Dominique Strauss-Khan which is from HEC). Traditionnal good politician's curriculum vitae is: Sciences Po (first "grande école) and then, after 5 years of intensive training, you can pass the exam of the ENA which is the most exclusive school in France. Almost every french presidents are from there, that's why the french system was highly criticized, when you know that only 7 per cent of the people which are accepted in those schools are not from the upper class (let's not talk about the ENA: from what I know, only one student per year is from the lower-class)