[BillyCoxDodgers3B]

Not at all. Just think of various utilitarian ways a pen or pencil can be used other than to write in a language. An illiterate adult would have had many reasons to make marks throughout their life--the point being that the motor movements would have been much more developed in a fully grown individual as a result. Remember, even if the writing implement wasn't held in the 100% proper way, a person is likely using the very same muscles and motor movements whether writing, drawing or making a mark on a 2X4. A pre-schooler's pen, pencil or paintbrush marks are generally fraught with more trepidation. While Jackson's autograph does exhibit slowness and hesitancy, try getting your three year old to write "Joe Jackson" anywhere near as nice. If your child is gifted, they'd likely be more literate than poor Joe, too, but they still couldn't do as good a job. Case closed.