"some years in the past" could mean 1967.
It had to be in the prior 15 years that the counselor had been at my D's school. My D's H.S. had about 50-60 graduating seniors every year, that means the counselor had seen about 750-900 students in that time period. I am pretty sure he said there had been two students in his experience at that school, but I only remember what he said about a certain student from what I took to be the more recent past (prior 5 years). I may be mis-remembering the details- there may have been a few D's along with C's. There were no F's.
The college was Johns Hopkins.
Funny thing is, we had this conversation with him because my daughter was worried about missing a couple of days of class to go to Bulldog days and Princeton Preview days. She had been trending a B in AP BC Calculus and was afraid that she would fall behind too much and heaven forbid, get a C, and then get rescinded. The conversation with the H.S. counselor provided the reassurance she needed to go to BDD.
I have no memory of what grade she finally got in BC Calc, though I know she got a 5 on the exam.