Just a comment.
My 8 year old son recently tested on the WISC IV. While it was good for pointing out some significant processing and organization issues, much of the test seemed to be geared to these abilities. There is a dramatic difference in the subset scores on the untimed sections versus the timed sections. The overall Full Scale IQ seemed to me to be more weighted to the sections impacted by the processing and organization skills. In fact the tester even commented on that fact that the Full Scale scores was not a good indicator of our son's true intellectual ability.
Many others on this board are much more familiar with the tests so I'm not sure if this is a problem with all of the IQ tests or not.
