> ...gluten is something that seems to be a culprit of IBS symptoms in certain people. That doesn't mean that gluten is bad, just that it causes a poor reaction in some people...
This is also my take on it.I've watched it first hand with my wife -- who is 1/2 Italian -- giving up pasta and bread in the last few years. It has made a huge difference in her daily quality of life with respect to digestive issues (mainly bloating and gassiness).
Gluten is a protein so it's not hard to imagine that either this protein is not easily digested by some folks or some byproduct of its digestion feeds some specific gut bacteria that produces inflammatory compounds. If Celiac is a full blown immune response to inflammation caused by gluten, then it seems reasonable that some folks would have a spectrum of reactions to barely registering it or somewhere in between (like my wife).
It's possible that it's some other compound that's prevalent in wheat, but avoiding wheat-based products has been life changing for my wife. I would add that this has developed with age similarly to how she has become lactose intolerant as well around the time she turned 40 so if you're in your 20's or 30's and you think this is malarkey, well, give it time (and really enjoy your lactose and gluten!).
Why folks downvoted the original comment, I don't understand; this is based on firsthand experience hacking her diet and observing how she felt. I'm not here on some anti-gluten crusade (my kids eat and enjoy plenty of gluten for the entire household!)