Guess what? It DOES work. I just went and tested it with the bar hanging in the middle of the screen. It was just as accurate, if not more so. I don't think that upper/lower option does a hell of a lot.

If you think about it, screen size makes no difference. All the pointing capabilities are based on the location of the bar. If you took a little TV with the bar on top, and then put it in the middle of the huge TV, the bar would be near the middle of the huge screen. If you hooked the Wii up to both, the pointer locations would be the same on each screen. All the screen does is output, the bar is the only real "input".

With a screen 106" big, the upper/lower option won't make a bit of difference. Actually PUTTING the bar upper/lower WILL. Near the center is the only option for a screen that large to get somewhat accurate. Your seating distance from the screen probably impacts it too.