I had my DS, almost 13 now, do WISC-IV in March in order to qualify for Davidson. He had never been tested before (outside of something at school). It worked out fine.

He had done JHU-CTY stuff before and scored at the top. I didn't feel the need for any sort of IQ testing, but that's what Davidson wanted so we went with it. I do think the results were interesting, but not necessary for us in any way.

Regards,
Jon