I had a total different take on this article.
I thought it was stressing the fact that the gluten free diet is not a fad weight loss diet. If you need it for health purposes, wait until you have your testing done or you'll negate your results. Gluten free in a restaurant is totally different for someone who needs it medically than for someone who's using it as a weight loss diet (as we have seen being hammered out in the Domino's Pizza thread.)
He has one line
Actually, I find the diet quite depressing at times when I think about foods I love that I can’t eat anymore.
which I think comes across as honest but not a death sentence. My daughter has been on this diet for 5 years . . . she still gets sad about a couple of her favorite foods (particularly Panera Bread cinnamon crunch bagels).
I did not find it to be a negative article at all.
Just my opinion.