I suddenly got curious as there seem to be quite a number of mums on MN who describe their children as reading chapter books before the age of 5.
Equally there seem to be a lot of people who say their child (often boys) are verys low readers in Reception but by Y1 / Y2 are reading anything / everything.
So ... do the early readers stay ahead of the others who are catching up? Does everyone end up on roughly the same level? Or do the early readers 'burn out' and start to slow down at some point?