I had not heard this tidbit. I have heard Wii Sports Results is fun (if you like those kinds of games, which I do). Since my sister and her husband own it, I may try to borrow it from them to see what the motions are like.
I thought I read a quote that it would be possible to play SS sitting down, though, even if you wouldn't get the full immersion experience. Those of you who own WSR, does that apply to that game? Seems like it'd be more of one played standing up...