At age seven you wouldn't have seen any glimmers of giftedness in my son either.
My 2E son was as you describe this child. Most people thought he was slow and generally not overly with it. I occasionally saw flashes of brilliance, but they were very few and very far between. On the first IQ test he took at age seven, he did indeed score in the high nineties--and I *don't* mean percentile-wise. The scores were uniformly low, but processing speed scores were through the floor.
Five years later, he was diagnosed with dyslexia and ADD. He also had an HGish GAI. The flashes of brilliance have gotten more frequent though certain things will always be more difficult for him.
