Should we be concerned over changing definitions of autism?

I'm not: Lables like autism, autism spectrum, developmental delay etc are part of the language of research, funding, or treatment. The shifting boundries mess a bit with the numbers quoted for how many/when DX etc. but don't change the needs of patients. Some change is driven by need to focus research on uniform subjects, but often labels enter the money game & help determine educational funding.

Maybe: Changes in diagnostic categorization have large implications for disability determinations, school eligibility for services, treatment, health care insurance, health costs, and public policy, so it certainly is not trivial. There has been controversy about this and other changes in dsm-v, but there will be more specific criteria which is needed and aovidance of overdiagnosis.