FWIW, I have better luck with the (brief) truth: DS7 was a good bit ahead of the school's curriculum, and we didn't want to grade-skip him at the time. Some people pursue the issue, some don't, but we've had no bad reactions...and a surprising number of extremely positive and supportive ones!
This is basically what I had come up with, too. And really it's true! We're not sure we want to grade-skip her right now (maybe in the fall?), partly because of the 4-day testing thing and partly because she just doesn't seem that excited about it. Thanks for pointing me in the right direction.
