I see what you're saying, but I don't think IQ tests are really purposed for finding GTness. That's not why they exist. They are used that way, sure, but it's not by design.

I think they exist to find out how people will fit into the educational system, or perhaps a work environment for adults. I think they picked factors easy to test that related to that goal. Persistence is harder to test and doesn't seem like intelligence to the average person. But memory and speed do. So they picked those.

Do I like them as a measure of intelligence? Not so much, no. But I do think they were useful for me to see on my son's test, and they did factor into his issues at school.

<shrug> It's kind of a wash for me.

Kriston