Elizabeth -
It's really important to have goals whenever one does a test, to help guide the tester.
What are your goals?
Write them down and share them with us if you are comfortable...I think it will help.
I you think that your child is more than 'usually' gifted, then it is super important to find a tester who 'gets' gifted children, and can help you.
There is an advantage to waiting until age 6 and using the WISC. The problem with any gifted kid taking the WPPSI - not to mention an unusually gifted kid, is that they run out of test. You may be used to 5 year olds who read well, but if most 5 year olds don't read, then why put items that measure reading on the test? Since the WISC was designed for kids who do the sorts of activities that your child does, it will give a more accurate picture?
Hope that Helps,
Grinity
