this isn't always the case, though, the woman on the phone told me they also do it by phone and email, it just depends on what the interview coordinator feels like.
you're not crazy. it's nice to know whether you should be dashing home to check mail, keeping your email inbox open at all times or checking your voice mail obsessively.
how 'doctorish' of you to what to maximize what you know so that you can focus in on the chaos a little better.... 😉