Okay, sarcasm aside. I think this goes a looong way to show that the Wii demographics are *really* foggy and hard to target. This game sold big, and this is just my crazy theory, merely because it has Wii[name] and the Nintendo 1st party stamp of Nintendo goodness on it. The new-gamer masses are afraid of things that aren't officially good endorsed products.
"Designed for Windows 95/2000/XP/Vista" == "Wii[whatever]" == Big-Name-Company Says-Its-Good == soothing comfort to non-gamer/non-savvy.
Star Wars: TFU sold like hotcakes you know. It was pretty mediocre.