"The truth is that classical education has always been designed for the introvert: students were required to sit quietly at their desks, wait to be questioned, do work in silence, etc..."

True, although I think that had more to do with making kids obedient, or expecting them to be obedient, rather than school being "designed for introverts". Also, putting a bunch of kids together in a room, and expecting them to speak up or do things in front of the class, certainly don't favor the introverted.