I would agree, CFK, that 3 years ahead at age 4 or 5 is a bigger deal than 3 years ahead in upper elementary. I think that's a good point. Especially without both types of test scores to back you up, I think you want to show as much advancement as possible.
I don't think DYS *requires* all work at 4 or 5 years ahead of grade level, but personally, I don't think I'd submit anything that was "only" 2 years ahead. (Wih the understanding that 2 years ahead is a gifted kid!)
Again, remember that you want to demonstrate to DITD that your child is PG, not MG. I'd suggest looking at the most advanced work your child does and submitting that.
