J12t, About half of the Fediverse addresses typed by FediForum attendees into the session notes are missing the leading "@".
People typed in their very own Fediverse handles. And because they came to FediForum, it's very likely they are very well acquainted with the right syntax.
Pretty strong circumstantial evidence that most people won't be able to distinguish Fediverse handles from e-mail addresses.
I have long believed that they should be the same.