They probably don't want it to look awkward when it's in HD. For HD, there are generally two different graphics strategies:
1) Like this - keeping the graphics smaller and having them terminate within the safe zone (ESPN is a good example of this)
2) Stretching the graphics across the entire screen (16:9) while keeping the area outside the 4:3 safe zone content-free
I'm guessing the width of the title bars will change based on the length of the text within them.
No, I still haven't slept since earlier. I should probably go do that.