I'm not so certain that a test like that is proof of anything other than that someone has the resources to study for that test. Seattle's system seems to have been a magnet program (where such tests are maybe appropriate) masquerading as a gifted program. One has to wonder how many gifted students went underserved so that such a magnet program could be maintained. Sunsetting it for a neighborhood program seems fairer and more effective.

In any case, it's good that you've observed your daughter's failure to achieve without an extrinsic impetus. It's probably a good time to sit down with her and determine what excites her intellectually so that she can be empowered to pursue that subject independently. I can tell you first-hand that relying on a school or school system - even one that routinely sends graduates (minority and white, working and middle class) to highly-selective colleges and universities - to shepherd students into stable and lucrative careers is currently a fool's gambit. Academic achievement is often necessary but not sufficient (and also more expensive and time-consuming than incorporating a measure of autodidacticism.)