My little one had to have the ADOS 3 times within 6 weeks and while all 3 evaluators did agree on the diagnosis of "classic" autism, all 3 had different results on the ADOS despite similar performance by my DD. The developmental pediatrician said there was both language and social impairment. The school psychologist said that she had language impairment but not social. The Regional Center psychologist said she had social impairment but not language delay. So my personal opinion of the ADOS is that it's not a very reliable assessment since it's so subjective.