I don't think the information is going to be valuable because you're not controlling who is taking the test.
Selection bias is always the bane of the social sciences. And it can't be eliminated, so the best you can do as a researcher is disclose the shortcomings of the selection process up front.
It seems like it would be relatively easy to find kids who've taken appropriate tests to pre-screen them, then have their parents take the quiz.
Shooting it out into the ether and hoping you get a reliable result because you've plopped it on a gifted chat forum is not what I'd consider "doing your best".
I think it's an interesting question, but I don't know if the answer is ultimately valuable-I deliberately look for extracurriculars that are non-academic so the girls can work on their social skills with regular people.
The last thing I want them in is the gifted kid hip hop class. Blech, no thanks.
