An article by Kaufmann, et al. in the Fall 2000 newsletter of the National Research Center on the Gifted and Talented:
"Given the realities of the co-existence of giftedness and ADHD, the question should not be "ADHD or gifted?" but rather "how impaired is this student by his/her ADHD?" Some children are able to compensate in most situations for their ADHD (and neither they nor their parents or teachers may be aware of it); others are seriously handicapped. The single most relevant element that must be considered in evaluating ADHD is the degree of impairment a child experiences as a result of the behaviors."