The funny thing is the Adventists seem to produce good hospitals but are still creationists. I guess it’s not a big deal how we got here if you just want to do medicine.
It's very common in US private schools.
I think this depends a lot on how you select the set of private schools you're looking at.
Please provide a reference to this.
Uh, it's been a while since I've been inside one, but I would guess it's very common in a certain strain of US private schools, not as a rule.