I scored a 12, but was not inspired to actually take that test until reading this post. And I haven't bothered putting up a response to the original post. People who are most likely to take that test seem like people who already suspect they may have AS to some extent. People who know that they very clearly don't are unlikely to be interested enough to take it. So there is excellent reason to suspect that your sample is highly non-representative and bias in favor of overreporting.