Heh. I have a blog post about that as well! Basically, some women do really believe in 'traditional' roles for women. Maybe they've benefited from the current situation. Maybe it's part of their upbringing. If that's why they're making the comment, feel free to call them out on it.
If they're doing it to be ironic (I know I have), then you can probably shrug it off. Many of us have learned to be subversively snarky to put off the ones above.