Flawed study of adult autism in UK

The NHS has recently published a study of the extent of adult autism in the UK ("Autism Spectrum Disorders in adults living in households throughout England - Report from the Adult Psychiatric Morbidity Survey 2007").

It supposedly shows that there has not been any real increase of autism over recent decades. This is the same NHS that's just made a huge scare-campaign in support of the swine-flu scam, and that gives its endorsement to the fraudulent SCENIHR report as supposedly proving the safety of dental amalgams, even despite numerous people pointing out the falsities of that report.

This autism report is also unacceptably flawed. Some of the flaws are detailed at this campaigning website (at which some of the other content is itself flawed wishful-thinking):
http://childhealthsafety.wordpress.com/2010/02/10/uksurveyautismlink/.

I myself had dismissed the NHS report for the simpler reason that there is no way indicated of establishing comparability of a test applied to children and a test (even if the same one) applied to adults. But I now welcome the additional critiques raised by childsafetyhealth. Another critical review can be found in issue 34 of The Autism File.