My theories as to why I've felt no changes:
1. I have Celiac Disease and have been gluten-free for nearly a decade. Though I do generally eat non-gluten grains, it's in moderation. It's probable, considering the countless improvements in my health since that diagnosis, that my gut is just fine.
2. Though I've about doubled my veggie intake to stay full, I've always eaten a lot of veggies. Most of my desserts through life have been fruit, though there are certainly occasional exceptions. In general, I find most desserts entirely too sweet to enjoy. Most of what I eat is Mediterranean, Thai, or Central American home-cooked traditional staples rather than the SAD. But for little things like no yogurt, no nightshades, and no beans, this really isn't a far cry from how I normally eat.
3. I work next to a refinery, port, freeway, and super-polluting train. If anything is triggering my symptoms, it may simply be the obvious environmental effect of where I work. I am certainly not the only one to have developed health issues while working there (we have, in fact, won lawsuits against the refinery because of these things and are currently in a suit over the trains).
Like I said earlier, I'm really enjoying eating more vegetables because they just taste good. I'm sure they're good for me, too. But I have felt exactly zero of the predicted results of this diet -- no mood swings, no energy fluctuations (good or bad), no relief from pain, no interruption in my regular bouts of fatigue...
Right now at 25 days (28 if you include the three days before my official start date that included homemade broth with pepper in it against the no-nightshade plan), I'm not feeling very motivated to continue strict adherence or bother with reintro at a slow pace.