Yes, I have that. My firstborn boy was very advanced in most areas before 5. Did very well grade one, two - appeared to crash land in three. My younger daughter is HG (and 3.75 years younger) and was an early reader - he is extremely jealous and a bit resentful of her areas of strength. We had them both tested and he was also gifted. He even tested higher than her in the abstract reasoning test (similarities) and his GAI is as high as her IQ. He is NOT performing at school!