The article mentions brain plasticity, but I wonder how much of this is also genetic. Using myself as an example, I started reading novels relatively early, mos

The article mentions brain plasticity, but I wonder how much of this is also genetic. Using myself as an example, I started reading novels relatively early, mostly skipping the entire YA genre. I clearly remember reading "Jaws", which is definitely not meant for children, when I was eight years old. Does precocious reading mean the left anterior part of the temporal lobe and the Heschl's gyrus are already larger/thicker to begin with in some people? Or do they develop rapidly in response to reading as a stimulus?