In the second episode, Jon & Heather explain why The Fringy Bit includes gifted individuals under the label "differently wired".
Mentioned in the Show:
IQ Bell Curve seen below
Asynchronistic Development, as included in definition of giftedness quoted below
blogpost about Being a Smart Girl
"Giftedness is asynchronous development in which advanced cognitive abilities and heightened intensity combine to create inner experiences and awareness that are qualitatively different from the norm. This asynchrony increases with higher intellectual capacity. The uniqueness of the gifted renders them particularly vulnerable and requires modifications in parenting, teaching and counseling in order for them to develop optimally." The Columbus Group, 1991