Is it wrong to use the term 'low iq' when talking about people with a mental disability?

Autistic people can have extremely high IQ’s. What they usually lack is social intelligence, which is obvious considering autism is a communication disorder. I’m on the spectrum and work as a web developer and I am a technician that works on, appraises and sells commercial and consumer equipment like servers, laptops, projectors, networking equipment, etc... My social skills aren’t that bad but it will never be the skill that sets me apart.

Yes It is wrong.

Depends on the context. 

That example doesn't sound like they are calling mentally disabled people low IQ, they are saying that people who ARE low IQ (not as an insult) are among those they work with... because those people generally do have an intellectual disability compared to the average person and the demands of a world not designed for those below average.

It's obviously wrong because there isn't a connection between having a 

mental disability and a low IQ. Being classified as low IQ would imply that 

such a person is intellectually disabled.