You went to high school with Niklaus Wirth?
But that was just an offnote observation, when I got to college I already knew how to program but MANY of my student peers had A LOT of trouble in the first year grasping the basics. These were not dummy students, they were top ~3% of students in the college entrance exams.
At least 50% of my class didn't understand pointers properly by then end of first year.