This is really for Patti because her previous 'rant' about her digestive problems seems to have developed into a discussion on potatoes (we do dive into every little corner of a problem don't we).
I read something in a newspaper (I know as bad as Dr Google) and I think it was the D Mail (Wot?) about the sensitivity problem, but I can't darn well find it now, which I thought was quite interesting. Basically it said some people show the same symptoms to gluten as coeliacs do, but it doesn't damage their gut, and that by avoiding (not necessarily cutting out altogether) grains they could live a pain free life and stay healthy.
This article is along the same lines and explains it better than me. (I hope it scans)