Have to say I've always found the secreting thing a bti scary- along with chelation therapy. A friends ASD daughter was given chelation therpay (not for her ASD but because she had lead poisoning). This was all done under medical supervision by a consultant paed and it was still pretty terrifying. I'll try anything , as long as it is safe, and for me secretin and chelation are definitely NOT safe.
Agree about doing one thing at a time. For us the big effects have been gluten and strangely enough peanuts. On peanuts ds1 was simply a headbanging lunatic. I suspect he can cope with small amounts but when he was having peanut butter twice a day(just ground organic peanuts according to the label) he was completely out of it. Likewise gluten and recently sorbitol. Other things like apples he's fine with, and I'm not convinced about removing milk in his case (although I've never done a complete cf diet when he's been gf becuase of diet limitations). He's a fairly classic case though. No autism in the family- but lots of autoimmunity, and a regression following stacks of antibiotics together with a diet limitation at the same time (from eating everything to literally only eating bread). And the positive Sunderland urine result. They seem to be pretty good predictors- I only know one other person who has trialled the diet for any length of time- her test result said they couldn't find any problem- and there was no change the whole time she tried it.
It would all be easier with support, I think people do panic and rush into everything at once. We have tried to try one thing at a time. The Sunderland protocol is quite good and makes the point quite strongly that you should only continue with any intervention if seeing an improvement. In your case your son sounds like exactly the sort of person I wouldn't expect the diet to work!
I always think its a shame when these autism camps seem to spring up. I'm sure you've come across people who are very vociferous about ABA (both for and against) and I always think its such a shame that we can't kind of pick and choose interventions that would suit our individual children without it being political. I always think I know my son better than anyone else, and I know what has worked for us, and what is likely to work- I wouldn't presume to know what would work for anyone else's child or family. I just think we've got enough to cope with when facing the NT world without everyine fighting amongst themselves. It was a problem on Aut-Uk for example although seems to have died down somewhat. chatters was always fine- I haven't managed to get anywhere with getting an invitation though I did try!. I suspect I haven't been contributing enough myself recently to be given any favours Been on mumsnet too much.
Hope you're feeling better. I've got gastric flu- bleargh.
Oh got to disagree with you about homeopathy btw as I'm training to be one One day I may try homeopathic secretin! I'll let you now if it works for us!