Four-course sounds grandiose but it's nothing more than a little carrot salad, a meal, a little piece of cheese and a yogurt (and some bread), that you get on your meal tray. No kid spend 90 minutes eating that; they rather spend their time playing during the time of lunch break. So it's top 20 minutes swallowing everything (or half of it actually) as fast of possible.
Good to know. Next thing the he was going to say they started educating children on the pleasures of France's great wine production while in kindergarten.
In term of perceived rudeness of French people, I think a lot of it is communication barrier (it's better now and it's changing but French people on average suck at speaking English and are self conscious about it) and the fact that Parisians are universally seen by French people as being ever so slightly snobbish and rude.