No, there is no empty space on top or below, see screenshot.
It makes it just more logical, you can build at the top middle cell, but not "into" the corners.

Looks very nice to me:
![depot](https://f.cloud.github.com/assets/1968396/2155974/7be57a78-9450-11e3-8e54-9580607d01f3.PNG)