Yes exactly, particularly when it is being spoken about in a specific context where an observation has been made that other women in that situation behave differently. It doesn't mean that there are no other women like this, just that in a particular context a woman can stand out as different or unique. I often wonder why can't women notice that they stand out in a certain situation? It's just an observation. Likewise I think Elizabeth is merely expressing a thought from observing other women around Darcy and perhaps other men of a similar ilk at the time.