Could be. It is also true that in many poor Latino areas, the schools aren’t the greatest. In our neighborhood, they have test scores that are really really poor. Wealthier families are able to pay for Test Preparation. Some programs are now offering this for low income students through EOP. These programs possibly could be helping. Another factor is environmental, in East LA where we lived when my son was born, we were right adjacent to a freeway. Studies have found that mother’s who lived within a mile of a freeway are 4.4 times more likely to give birth to children who will later be diagnosed with autism. Exide which has been in the news in Los Angeles, had toxic plumes contaminating the neighborhood nearby with lead and other toxins. Does lead impact learning? Of course it does.