Dottie, thank you for all the information and the trouble you've gone through to type everything out.
Thank you for your encouragement, Gratified3. I am stressed out. I don't like my son going through such serious test at this young age.
Our psychologist told us that having a high VCI on WISC IV does not mean he will get a high total reading score in WJ III, especially he has a lower processing speed score on WISC. Being a gifted boy with asynchronous development, it is impossible to speed up his writing.