I tried my hand at Brawl online yesterday, expecting a similarly smooth experience to Mario Kart, but was severely disappointed.
Granted, I'm playing it on a different network to the one I usually use, so maybe my signal is worse, but before I run around the house trying to reposition my Wii I thought it might be worth asking if anybody has had any similar troubles.
Connecting is no problem and the game runs mostly without issues, but every time somebody dies or respawns things go a bit funny.