Do Americans really call *all* college teachers 'professor'?

As an undergrad, I did. As a grad student, Ph.D.'s were "doctor."

Well, when I was an Instructor, I was always teaching in French, so mostly I got Madame.

Elsewhere I was a Visiting Asst Professor, so Professor was appropriate, and I'm pretty sure was used by students even for people that were Lecturers or Instructors. I mean, what else are they going to use?

If someone is a Professor, either Assistant, Associate, or Full, I do use Professor rather than Doctor in letters since that is the higher title.

Unless you're Al Gore, it is unlikely you would teach at Colombia without a PhD, or other relevant degree. Or say, multiple interviews and presentations, and articles to your name.

This is where I tell the story of my professor, who was a nun and a Ph.d. Her last name was Hoctor. So, against all conventions, we always called her "Sister Doctor Hoctor"

I mean, what else are they going to use?

I've always called all my lecturers* by their first names. Without exception. It was a bit odd as a first year undergrad, admittedly. But my current dissertation supervisor is younger than me. If I'd called her 'Dr --' instead of 'Anita', it would have made her laugh rather a lot.

So, against all conventions, we always called her "Sister Doctor Hoctor"

Hee. Did she have a sense of humour about it?

*in the UK, we use this term used for university teachers generally. You can have tenure-track lecturers or fixed-term (adjunct) lecturers, etc.

Oh yeah, we would have adjunct professors, etc., which is different from being the Smith Professor of Blah Blah.

I had a philosophy prof. who insisted on being called by his first name, Fred. He told his students that if they had a problem addressing their instructors by first names they should call him, "Mr. Fred".

F-Dawg.

they should call him, "Mr. Fred".

A little too close to "Mr. Ed" for my comfort.

Laga - Heh. Nice of him to give them that much comfort space. I've taught in community colleges, and I'm always addressed by my first name, even among younger students. If my students find it odd, they get to call me 'Miss [surname]', and I in return get to call them 'Mr [surname]'. With eighteen-year-olds, that tends to last for exactly one class...

I have no issue with first name use, but, yeah, it seems to weird students out a bit, especially, I think, as they're going to be teachers, and that would freak them out a lot.