The person who diagnosed you is probably "preparing" you for the fact that, if the proposed changes for new diagnostic manual scheduled to go into effect sometime during 2013, Asperger Syndrome will no longer appear as a distinct diagnosis. Though DSM-IV, which still includes AS as a diagnosis, is officially still in effect, DSM-V is not planned to include AS anymore, but will move all AS diagnoses into and under Autistic Spectrum Disorder, which is what you have already been diagnosed with.
There is a lot of debate over whether all current AS diagnoses will fall under the new criteria for ASD. I personally feel it's a lot of "mucha do about nothing."
I honestly think that although the "official" diagnoses might change, most doctors will probably still use the term Asperger Syndrome anyway. I'm sure there will be exceptions, but I really don't think it'll amount to a big deal.
AS is already considered an Autistic disorder anyway, so it's not as if you've been "short-changed." If you have AS, you are Autistic.
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I'm not likely to be around much longer. As before when I first signed up here years ago, I'm finding that after a long hiatus, and after only a few days back on here, I'm spending way too much time here again already. So I'm requesting my account be locked, banned or whatever. It's just time. Until then, well, I dunno...