Ask HN: How do twice-exceptional kids do in Gifted and Talented programs?

Our son, 9, probably has an IQ in the 150-160 range but he just failed the local district's gifted and talented testing. Why? He has ADHD and got sidetracked. In the testing, he answered 50 out of 51 correct. The problem is that there were 68 questions. He got bored/tired/sidetracked/typical and just didn't answer the others. So the district failed him. In talking with the person in charge of the G&T program, she basically said that twice-exceptional [1] kids typically struggle in this environment. She said that, if he didn't do well on the test, it's sort of harbinger of how he would do in the G&T program. Which sucks. So I'm trying to decide if I should fight for this or not. I don't want to basically put him in AP/honors classes if he's going to struggle because of the district's design of their G&T program. Anyone else gone through this? We already had a 504 [2] letter on file for his ADHD but they did nothing to identify this prior to the test. As such, he took the test like everyone else. 1 - http://en.wikipedia.org/wiki/Twice_exceptional 2 - Code for "has special needs" and it's due to his ADHD