Secondly , Autistic people really do have trouble functioning. Tough i do agree with you that people with Asperger's usually don't have aspergers at all , and are usually just anti-social/too sheltered.
But here's the difference:
"Autism and PDD-NOS (a moderate form of Autism that can't specified by any other spectrum disorder) is considered to be "low-functioning." People with Autism or PDD-NOS have "stimming" that are considered to be "unusual" behavior (e.g. flapping their hands; rocking back and fourth; spinning things; rolling around in blankets). They may have sensory integration disorder(s), which means any of their senses might be overloaded and overwhelming to them, which they can't make sense of. Many people with Autism and/or PDD-NOS are non-verbal."
"Asperger's Syndrome is considered to be "high-functioning." It is identified in people who have average or above average intelligence. They may have sensory integration disorder(s), which means any of their senses might be overloaded and overwhelming to them. People with Asperger's Syndrome also have self-stimulation (or "stimming"); in other words, obsessive and narrow interests (e.g., trains; video games; cars; astronomy). Most people diagnosed with Asperger's Syndrome don't have problems in language, although it has been noted that speech can be unusually fast, jerky, loud or quiet. Some researchers speculate that there is a difference between high-functioning autism and Asperger's Syndrome. So, it is possible that the people with high-functioning autism have problems with language while those with Asperger's Syndrome do not. Most notabily, individuals with Asperger's (like with autism) have social skill impairments including problems with the use of multiple nonverbal behaviors such as eye-to-eye gaze, facial expression, body postures, and gestures to regulate social interaction.
Also, like with autism they may have trouble developing peer relationships appropriate to developmental level."
So . as you can see , there's quite the difference...