Well, also understand that in some instances, those kinds of out-there placements WOULD be happening, but not for radical whole-grade accelerations-- so technically, 9yo DD was taking geometry, which would have been a "tenth grade" class, only she was only in 7th grade at the time, officially, though she was taking all 8th grade coursework otherwise. But even so, without full-grade accelerations (2 of them) she'd have only been a 4th grader at that point.

So under more normal conditions, yeah-- that does mean that she'd have been bussed to a high school for that course.

Schrödinger's cat walks into a bar. And doesn't.