63dad, you may want to start a different thread since you are discussing a different test. There have also been a number of threads here about the CogAT if you want to search for old threads.
Just to give you a basic overview, though, the CogAT is a group test and does not purport to be an intelligence or IQ test. The non verbal section is probably the section that is least subject to exposure or related to high achievement in school. Kids who score highly on the non verbal section tend to be more visual-spatial or out of the box thinkers.
I think that it also depends on what you mean when you say "extremely high" and how his scores on that section compare to other sections of the test.
