I saw the "M" but it wasn't in the fur design. It looked more like a part in the fur. And it didn't look like a direct "M" like what you drew, but more like four lines that made up into a sort of "M" design, but not an actual "M".
Well I know that. It is just similar. Besides it wasn't me who discovered that. I just learned it when the kept saying it on Family Channel when Puss in Boots was coming out. They said "Did you know, Tabby cats have a distinctive 'M' on their forehead?" or something like that.