If she has the courage to display any disdain over your overtly sexism comment though, perhaps the boss would take (mental) note.
At the same time, the boss may not even be aware of the sexism in the initial request--he/she may rationalize the request/decision after-the-fact, even if it were made in a sexist light at a subconscious level. In that case, that comment may end up offending both the boss and Sarah.
(And yes, women in management sometimes are more sexist against female subordinates than male counterparts.)
If you follow up your comment with an apology and an offer to take notes, however, everyone will feel better.
I think I might say "yes, boss, because the possession of a penis renders one incapable of note taking, obviously" instead but that's more about the turn of phrase of my sense of humour than anything else.
Edit: to elaborate, corporations aren't concerned with being labeled as sexist. They are worried about being sued because of sexism, because it's one of the toughest kinds of corporate lawsuits to defend against, and one of the most lucrative kinds of lawsuits for the plaintiff. (IANAL though)
Edit: it's really sad that HN has such a devotion to using the word "girl" to describe women. It's flat-out demeaning, whether you want to admit it or not.
I never really considered that calling a woman a 'girl' was a way to demean or lower them in status (I do use the word on occasion). I think the key difference is that I would never address a woman as a girl ("Come here, girl") but I may refer to someone as a girl if she in her 20's or younger ("Hey, that girl dropped her college id, can you give it to her?) Or I might say "Do you want to see if any of the girls in accounting want to go to lunch?"
Is this really the bar for modern-day sexism?
Why can't you simply say "women"? What's the impediment? Why do you so cling to "girl"?
Now if we agree on that, then to make any absolute claim that calling a woman a "girl" is demeaning then we must either make some universal claim about the intent of all those who use the word or a universal claim about the reaction of all those that hear it. I think either of those claims might be overreaching. Or maybe I'm just setting the bar too high.
We obviously live in different parts of the world with different social expectations for language use. Beyond a certain point, arguing about when it is ok to say woman or girl is just pointless bickering over divergent cultural expectations and nothing more.
I respect your viewpoint, you have definitely made me think. I now consider myself a Level 3 misogynist (up from 1).
Everyone laughs, boss realizes what he's doing, Sarah is off the hook.