I haven't got very far into the book, but so far what I've gathered is that the French are still eating the way Americans (and probably everybody else in Western culture) used to. Basic ideas, like you eat at meals, not in between. And just because your toddler turns up his/her nose at a particular food does not mean you should never give it to them again. That's certainly the way things were when I grew up.
Anyway, I shall be interested to see what else the book has to say. Where I stopped reading, the author seemed to be making the point that in France they still insist on better public manners than we do here these days.