What I think was meant by the OP's clumsy remarks about "kids, women, and underrepresented groups" is that App Inventor has proven successful at attracting members of underrepresented groups. Some successful outreach programs based on App Inventor include:
- The Technovation Challenge (high school girls from low-income families)
- Youth APPLab (African-American children and teens)
- Youth Radio's Mobile App Lab (Oakland-based young people)
The claim isn't that members of these groups can't learn traditional CS, just that they've generally chosen not to.