I can confirm

That after 10 years of my own particular entente cordiale, that some French people do indeed sound angry when they speak. Particularly my father-in-law.

I've noticed too that peculiar phenomenon of the English who go out of their way to suck up to the French, as if doing so somehow lessens the usual contempt shown by the French to the English - especially on the roads. So instead of a GB sticker, people have those little European flags with GB in the middle. Which in the case of a lot of French people, just gives an additional reason to hate someone, especially when they think about how prices have risen since the Euro was introduced.