If it helps, think of testing as a tool to help you understand your child better. It's not a contest, not some GT-only exhibition. It's a tool to teach you about your child's needs, whatever those needs might be. You don't have to know the answer before the test...then you wouldn't need the test!
To use our family as an example, I'm not sold on the idea that our DS4 is GT, but we're going to have him tested just to know what we're dealing with. Does it matter if he doesn't turn out to be GT? Not one bit! Heck, it would probably make life a lot easier for us! He could go to school and fit into a regular classroom without accomodation. Hurrah!
OTOH, I was pretty certain DS7 was GT, but the testing showed me that I was way off about his LOG. (I thought he was MG and he wound up getting DYS-level scores.) It also showed me that he is not much faster than your average 7yo, though he has a depth of understanding that is far beyond average. This led us to believe that homeschooling was probably a smart move in our case. But also, as a result of the testing, out went the timed math facts tests, at least as a main teaching tool. In came conceptual math. Very helpful to know! Math time got a lot more pleasant when I understood my child's strengths and weaknesses better. It was a very effective tool for us!
Maybe that helps?
