Kanner’s first description of children with autistic disorder included delay in intellectual development as an associated feature in several of the cases described (11). Moving forward to formal recognition of autism as a disorder in the Diagnostic and Statistical Manual of Mental Disorders, Third Edition (DSM-III), criterion C specified gross deficits in language, and criterion D stipulated peculiar patterns of speech, if present (12). Thus, early descriptions of ASD assumed that a significant proportion of children would be minimally verbal, which overlaps considerably with ID (13). In fact, earlier epidemiological reports indicated that as many as 70% of individuals with ASD had co-occurring ID (14, 15). It was only recently that epidemiological reports reversed this trend, with some suggesting that ID was present in as few as 30% of children with ASD (6, 16). However, methdology may artificially deflate these rates (17). Recent studies have found that both minimally verbal and ID subsets of the ASD population are disporpotionately and increasingly underincluded in ASD treatment studies (18), neuroimaging studies (19), and ASD research in general (20).