Yes, I'm in EU, maybe that's the reason for the bad Virtual Console performance, too. I heard there are some problems with PAL VC games, don't remember exactly. When I played Super Mario World on a friend's Wii some months ago, I noticed the same. It's clearly less responsive than on the original systems.
AFAIK there should be no interfering radio / bluetooth devices in our living room. I'll give it a try with the GameCube controller later.
Thanks for the hint regarding save games!
My TV is a LG 32LC2R (HDTV). Haven't tried a lot of games yet, but I especially noticed the jaggies in Super Mario Galaxy. Maybe I should have a look at the TV settings.
Currently playing: NSMB (Wii)