What you are describing sounds more like C.A.P.D. and not ADD or ADD/ADHD. CAPD relates to what you read and hear and to how it is processed. Skipping lines or paragraphs reading is part of it.
Could be. I know he has some hearing issues. But the medicine (adderall) DOES work it gets him to slow down and he is able to focus better. He is slowly outgrowing it.