Organizations that are selecting for high IQ often pretend they are not. Is there a difference between "general cognitive ability" and IQ?
I think that IQ is a way to get at that same
something that Google is apparently interested in.
We've talked a lot here about the hallmark of HG+-- it's not WHAT they learn, or when.
It's how FAST, in most cases. It's the number one problem in school fit, once you take away quite basic (stupidly basic, really) barriers like AR reading restrictions and getting "perfect" scores to "show mastery" of math concepts.
Most HG+ kiddos can go through all of K-12 in about 4-6 years, all other things being equal. They don't need the repetition, they don't need a lot of hand-holding and drill. They are learning machines.
IQ is an attempt to measure THAT quality. That's my guess.