I have seen only a few--as in, one or two out of thousands--being offended by the "Aspie" or "Autie" terms. That's about the same number of people who hate the pronunciation of "Asperger's".

I have taken to using "autistic" to describe myself, simply because there is so little real distinction between Asperger's, PDD-NOS, and regular autism in cases where you have a verbal teen or adult who has outgrown, or never had, developmental delay (that's most adults on the spectrum). In my case, there's no way to tell simply because I probably had some delays as a child; had I been evaluated then, they might have said anything from classic autism to Asperger's... so now I am simply "autistic" (as in "pervasive developmental disorder) and moderately disabled, with the most correct category probably being PDD-NOS.

You might be able to say that some case or other is "definitely" one or the other; but there are as many that are on the blurred lines between the categories. You can't even use functioning level; there are people with classic autism who are doing a lot better than most people with Asperger's, for example. I really think the distinctions are mostly artificial, and hope they will fix that problem when they re-write the definition in the next DSM. It's gotten so bad that over half of autism diagnoses are PDD-NOS ("NOS"=not otherwise specified, a catch-all that is supposed to include only a small fraction of cases that don't fit into specific categories). The autism spectrum itself is so very diverse, and if that weren't bad enough, it blends seamlessly into the typical. It's not a distinct group of disorders--it's the edge of a bell curve.