Well, they certainly don't know what the hell they're talking about because it's definitely not a disease. I guarantee it.

Here: http://www.disability.vic.gov.au/dsonline/dsarticles.nsf/pages/Asperger's_syndrome?OpenDocument - click it, press control and F, type 'disease' and hit return.

Jesus, I should take charge of their job because they don't know what they're doing and saying AS is a disease is quite hurtful actually. They shouldn't say that. Also, I know AS is rare, but that rare? I don't know.