PMartin - IBS can look different in different people. Many IBSers have the most problems in the morning, as you describe. I certainly don't have any direct reactions to foods, with the exception of too much fat in one sitting. That can make me feel sick to my stomach and start a chain reaction pretty rapidly. If you fit the Rome Criteria and your doctors have ruled out other serious causes of chronic diarrhea, then you most likely have IBS.
I've been strictly following the EFI diet for nearly 4 months and have not found relief from my IBS symptoms. It sounds like you've been severely restricting your diet and not getting anywhere either. I've recently found a direct correlation with my IBS symptoms and emotional upsets. It takes about 12-15 hours after an upset to see a flare up of symptoms, but the flare can last for days. Once things are in motion, nothing can stop them except time.
Are you still reading "The Divided Mind" by John Sarno? That book really speaks to me and I think explains the cause of my symptoms. I finished that book and am now reading "The Mindbody Prescription", another book by Sarno that discusses the same concepts, but in a slightly more simplistic approach. I am also working through his daily treatment plan which requires reflecting and writing on the possible causes of rage in the unconscious mind, and also rereading parts of his book frequently to remind you of how emotional turmoil triggers physical symptoms.
A few of us are discussing Sarno's theories on a separate Ning site (because we are not interested in debating their validity), and we'd love to have you join the discussion. Email me at frygurl@gmail.com and I will send you an invitation to join.