Sure seems like correlation to me. Older fathers are more likely to have established careers, establishing higher socioeconomic status, affording a lifestyle that engenders "geekiness".
https://www.autismspeaks.org/science/science-news/study-ties... "In the study population, advancing paternal age was associated with increased risk of some psychiatric disorders (eg, autism..."
Their research is biased, and the entire organization follows a gay therapy model (which is to "teach" gay kids that their orientation is wrong).