From talking to the women in my life, that would also be bad. They've told me that being treated as "superior" for their gender makes them feel that the rest of who they are - their accomplishments, knowledge, skills, etc. - is invalidated.
> saying "ladies first" is not ipso facto indicative of a misogynist view
You're right, but saying "ladies first" makes many women feel patronized - not a good thing.
> especially among people who were taught it is good manners
I'd say to those people: even if you learned that "ladies first" is good manners, that doesn't mean it still is. It's important to listen to the people around you to hear how they want to be treated, and what we're arguing in this thread is that women these days don't want to hear "ladies first" because - as stated before - it makes them feel patronized.