I think the getting noticed part is variable. My gifted kid would score in the 99th percentile nationally in math, and that would put him at around the 76th percentile locally. If he had a bad day and scored in the 97th or 98th percentile, he was barely above the 50th percentile locally. In k-3, he was surrounded by kids who had been doing Khan Academy and tutoring since preschool. He was not placed in the accelerated math in 4th grade (based on the 3rd grade tests), was identified as gifted that year, but because he missed the 4th grade acceleration, his options became summer school only.
So in hindsight, I do wish we had given him the early supplementation, knowing what I know now about the realities of our district and how a gifted kid without the early acceleration can be somewhat camouflaged in second and third grade among gifted peers who have had the outside work/exposure. He is (rightfully) concerned that this will hold him back within his areas of interest. But we donât see a good solution because he doesnât want (and we agree) to rush through any of the high school level maths.