quicko: oatmeal v. porridge

I have the definitive answer, Americans!  And it's not just "British" v. "American," although that's part of it:  porridge must be cooked and mushy.  Australians don't use "oatmeal," but they can refer to "oats" (they actually have a granola-type cereal that is literally oats and fruit and such) or, when oats are cooked, "porridge."  It's not simply the stuff of fairy tales, after all!