Screw percentiles. Screw “Developmental age”. Feck the “he’ll never” or the “she can’t” and to HELL with “you’ll just have to accept”.
The most hopeful thing anyone ever said to me when my daughter was in kindergarten, in Life Skills, intelligence not testable, was “most of the kids in this class learn to read.” We discovered by accident a year later that if the text was big enough, she could read quite well. Silently.
Fuck test results. Love your son. Presume competence. Eliminate barriers. We’ve got your back.