Cognitive processing disorder is language that they use in Special Education evaluations. My functional definition--as a teacher--is that it's a way to qualify a student for IDEA under Specific Learning Disability when the discrepancy isn't between the cognitive scores and the academic achievement scores, but within the cognitive assessment results. I rely on the school psych's expertise on this and many other issues.
If I were a wicked parent--and I would be, if I had children--I would ask the school to assess the student for creative and divergent thinking as part of a qualifying evaluation for a gifted program. I know from reading the websites of the University of Georgia and Torrance Center for Creativity that such assessments exist, but I suspect there are few people qualified to give them!