What about someone who needs a wheelchair but is conveniently successful?
But practically, the disorder definition above basically would lump the above poster in with somebody who was struggling to hold down a part time job or any social relationships as having the same level of disability. All therapies, treatments, accomidations, etc will end up calibrated for the more profoundly disabled person while being offered to the above poster. Generally, peoples first impression of the person will understandably be based on that of the average person with autism spectrum disorder if they're told they're autistic which will cause them to be pretty profoundly misunderstood.
That's just my take on this.