Thanks ElizabethN. I was thinking waiting would make sense too. As I said, I think for kindergarten at least DD will not need much in the way of differentiation. She will turn 6 halfway through 1st grade. Maybe that would be a better time to look into testing.
DS will be getting assessed again in a couple of weeks with WJ iii cognitive and achievement tests to look for learning difficulties along with some other assessments. His wppsi showed slow processing speed relative to verbal iq, but it didn't really break down many areas. Hopefully we will get some more info from the WJ. I don't know much about the WJ, but it doesn't give an IQ score I don't think, it will be interesting to see how DS goes on it and if it identifies any challenge areas for him.