Seriously, gluten-free is not a diet! It's an auto-immune disease. What is wrong with you people who actually thing that not eating gluten is a good way to lose weight? I'm sure that you didn't research that most people who try to go gluten-free (because it makes them sick - let's just be clear here) actually gain weight at first.
Gluten-free products can vary greatly in the amount of fat, protein and other nutrients they contain. Some gluten-free breads have up to 13 times more fat and 16 times more protein than others, according to a recent study that compared 11 different gluten-free breads. (Eating Well, Feb 2012).
The reason Celiacs are so skinny is because all the years we digested gluten are bodies weren't actually absorbing the nutrients we needed - which (again, just to be clear) is really unhealthy. Personally, I think that diets are unhealthy.
It's all about your life style - your activity, what you choose to put in your body. For example, I started mountain biking with a friend of mine and started to get stronger and healthier. When I went to eat I thought, well I'm not going to throw a bunch of junk in my body now that I've worked so hard to get to where I am. So, I'd reach for something healthier - like tuna or cashews. One begets the other.
The "experts" say to not cut out gluten unless you have a gluten intolerance or have Celiac. It's really hard to do it when you are forced to. I can't imagine doing it out of choice.
Happy and healthy eating!