Is Irritable Bowel Syndrome (IBS) really a disease?

Or is it a fancy way for people to say they have a touchy stomach.

I was told that IBS is basically not a scientific disease. It is a collection of symptoms that are similar that can have all sorts of different causes. I had it but then I took Align GI. Align doesn't work for everyone. This guy had better luck with yogurt: http://www.thedeucediaries.blogspot.com