It depends on what this counsellor understands by the term 'conversation skills'.
I assume she means turn-taking, the natural give-and-take, as well as how to argument, how to embrace the conversationalist's statements, how to keep a conversation going, how to be appear empathic, how to be interesting up until the finer tunes on how to lie, how to be witty, how to joke.
In plain English: do you appear polite, caring and understanding and or rude, unsympathetic and like a huge arrogant 4-letter word.
The AS question may be: does the person appear to know how to converse or does he/she appear clueless?
Good conversation skills suggest a person has good understanding of social interaction too. But language skills and attention themselves are already not a reliable indicator for how much a person understands of social stuff in certain disorders.
You should ask her for the specifics of what you did too well in her opinion if possible.
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Autism + ADHD
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The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it. Terry Pratchett