Everyone's been complaining about desync in the Skyward Sword demo recently. Most have chalked it up to it not being the final version of the game. I'm not exactly sure if that's true. I asked Rich, the guy reviewing SS at IGN. His reply:
I've played the game myself. For me, it's just has he describes. The aiming bugs out if you point the wiimote offscreen, but at any time while aiming you can press down to recentre. Not a problem. Motion desync has also not been much of a problem at all for me. It has not hindered my gameplay, and I've beaten all 3 modes through multiple times. Sure, I have to recal from time to time, but it's just about as Rich says. Nothing too serious. If the control in the final version was exactly the same as in my demo, I wouldn't have much a problem with it.
So you might need to get used to the demo controls. They might be there to stay.
Edit: No you can't call me Nick.
I've played the game myself. For me, it's just has he describes. The aiming bugs out if you point the wiimote offscreen, but at any time while aiming you can press down to recentre. Not a problem. Motion desync has also not been much of a problem at all for me. It has not hindered my gameplay, and I've beaten all 3 modes through multiple times. Sure, I have to recal from time to time, but it's just about as Rich says. Nothing too serious. If the control in the final version was exactly the same as in my demo, I wouldn't have much a problem with it.
So you might need to get used to the demo controls. They might be there to stay.
As a sidenote, I gave my Wiimote+ 5 good slaps on my hand. It might just have been my imagination but I think that helped.
Edit: No you can't call me Nick.