It's not like she called her the nasty names that might have been inside her head. I wouldn't do it- but I suspect in the wacky world of publishing far stranger and far more rude things come across this editor's desk. I doubt she's on some master list with a black mark next to her name. I would chalk it up to a learning experience and move on.
Far more rude things? Like what? from my perspective as the one getting this kind of call/letter/email, there is no purpose other than to say "you fucked up." The original post described this as "sharing good news". What's good about it for me? Remember, we're not friends. We're not siblings. We're not old chums from prison.
I don't remember the people I have to reject for whatever reason. I DO remember the people who call me up and are snotty.
If you don't understand why this is snotty, just take my word for it. And for everyone else, no matter what, do NOT call an agent or editor to tell them you placed a work elsewhere UNLESS they have the work in active consideration. I don't care if you think you know them, love them, have had sex with them even without regrets in the morning. Just don't. Y