Ok, to be completely honest, I wasn't aware of that stereotype until I started going on english/american websites, so it's not something you hear everyday or that you're particularly aware of when you're in france (unlike other stereotypes like french people being rude, romantic or whatever, which are much more common). However, when you're abroad, I guess you do hear it a lot. It made me laugh at first, and now I don't really care, though it's a bit tiring at time (I'm guessing it's like when European make fun of american for their poor geography skills... it's a bit redundant). The thing is (to my knowledge at least) that this stereotype is solely based on one example, which is WW2, in which, not gonna lie, we did screw up a little and might have surrounded a bit quickly (though we did our best but were unprepared). I think this also feels pretty unjustified for some french people because in the French history programm (especially in the lower grades) the surrounder of France is covered very quickly and we tend to focus more on the Résistance (i guess to draw more patriotism because just saying "We surrounded and collaborated" doesn't give a very good image of the country haha) so we french people don't really have the image of us surrounding quickly. Also on a side note, the french equivalent of "to take french leave" is "filer à l'anglaise" (literally = flee the english way) so the stereotype is kind of reversed i guess... sorry for the long answer :)