Correct. They sounded like human. The pacing was natural, it was real time, no lag. It felt human for the most part. There was even a background noise, which made it feel authentic.
EDIT: I'm almost tempted to go back and respond to that email now. Just out of curiosity, to see how soon I'll see a human.
As a general rule I always do these talks with camera on; more reason to start doing it now if you're not. But I'm sure even that will eventually (sooner rather than later) be spoofed by AI as well.
I am thinking identity theft. They make you talk, record you so they can speak again with your voice.
I only answer by phone to numbers in my contact nowadays, unless I know I have something scheduled with someone but do not yet know the exact number that will call me.