I have been gluten free for over a year, but mainly because I am celiac so I am allergic to wheat and gluten.
It made a huge difference in my diet and overall well being.
It seems there is a huge difference in how wheats are produced and processed in the US vs Europe, etc.
1 in 133 Americans is affected by gluten nowadays, but most people don't know it. Check out
http://www.celiac.com/