And how do we know; what evidence have we seen that this is still true today?
They certainly didn't show us much in Desert Storm I or Somalia.
While they're good at strutting along in that 'slow march' of theirs, I haven't seen any proof of their fighting prowess during my lifetime outside of the movies.
Maybe I just read too much Jean Larteguy at an impressionable age, or maybe it was the nights I spent drinking with Legionnaires in Marseilles...