While I generally really enjoy your articles I have to say this was one of the most disappointing. The writing quality was good but the science in it is very very bad. Things like linking gluten and autism have zero backing froms science. What parents "feel" about their children and what holds up under scientific scrutiny in this case are two very different things.
Now I am open to being wrong on this, but from the scientifically backed articles I have read on the issue the only people who should avoid gluten are those with genuine celiac (around 1% as you wrote), and any of those with a legitimate sensitivity to it - which is a very disputable number and is difficult to test for because of so many other things that can complicate matters when it comes to matters of diet.
Asking people if they "feel" better is a very very poor way to get scientific results done.
Going gluten free can be costly and (from talking to a friend of mine who has celiac disease) a REAL pain in the butt in terms of avoidance, and to suggest that people should do so simply isn't supported by scientific evidence at this point outside of those who have very specific health reasons.
I think you have a knack for writing, but writing about complicated issues like this often takes a LOT of research to do well. I think you can do a lot better down the road in that regards.
A good place to start (and I say start because the best way is to dig up the actual studies themselves) is from places like http://www.sciencebasedmedicine.org/
who tackle these types of issues a lot and do much of the heavy lifting when it comes to digging up the studies and research.
Keep it up, I read whenever I see you post a link!