I agree with fukitall. If that spot means you are balding then i have also been since I was 5. It just seems like of people receed a lot before the crown of there head is ever touched.
I often wonder the samething. I have no recession in the front at the temples. In fact I can see hairs connecting from eyebrows to my hair on the sides. However, If you look in back i have a spot there, but I have always had one. It just hard to determine if it is getting bigger.