By the way, our DS's ADHD was diagnosed using the IVA test and the Connor's (sp?) scales. However, my son clearly had an undisputed case (literally climbing the walls) - I think that we could have diagnosed him ourselves without the testing!
We were certainly not shocked about our son's diagnosis either! My friend told me that I needed to be ready to hear it before I took him because if I wasn't ready it wouldn't matter what a doctor told me. She was right. I knew it was time, and that made accepting the diagnosis much easier. It's actually a relief now just to have a plan.