Could it be a regional thing ? She might not even realize it.

But yes, I'd be taken aback by that too. It's too bad you can't speak to her one-on-one about it - email and even telephone could be risky, you can't read how she's reacting.

I suppose you need to decide if it's worth bringing it up to her, and if it's worth the consequences if she takes it badly.

Rotsa ruck.