My son was diagnosed around the same age. He's now 10. He doesn't have the hyper tendency of ADD. He did speech therapy before his diagnosis. Like your daughter he was also good with his literacy and maths at that age, and was excelling his sight words, possibly due to the fact that we had already done the speech. My son is also a highly anxious boy and worries about stuff constantly, even things that might have happened 6/12 months ago. He is on medication even though his paediatrician thinks he's possibly borderline. We can see the difference when he doesn't take it.