was it the tone or other physical quality of their voice or like they said things that you believe only black women say?
No, purely the tone - if that's the right word - not grammar, etc. I just think that, generally speaking, black people sound different than white people. And to be more precise, I know a few black people who I wouldn't be able to tell are black over the phone, but I've never met a white person who I would mistake for a black person over the phone. The voices just generally sound different to me. I don't think that's a racist observation, but the question is whether it is racist to say (as opposed internally thinking) that someone is black based purely on hearing their voice.
I'm more curious why you thought saying it was a black woman would narrow it down thar much as to who you spoke with. I think that's the bigger issue that may be racist.
Fair question. To be honest, I was kind of on the defensive. I wasn't expecting the rep to flat out deny I had made the prior call, so I was reaching for any detail to indicate that I wasn't making it up. So I just started spouting everything about the prior conversation I could remember (she was a black woman, it was on such and such date, she read me the terms, etc.)