Well thanks everybody, I think this has cleared a few things up for me, and hopefully for others too.
Just to recap/update then...
1. A number of research groups have found a connection with Starch and AS that suggests NSD/LSD could be beneficial to sufferers.
2. These groups have published their findings in credible peer-reviewed scientific journals.
3. There has not, as yet, been a sufficiently 'high quality' scientific study to put the debate beyond doubt.
4. There is substantial personal testimony, on this forum and elsewhere, to the effect that NSD/LSD has helped sufferers, and some people also assert that eliminating diary has also been helpful.
Is this a fair summary of the situation?