You know why It didnt lag? Because theres far less data to be transfered. At least thats what I think. Wii has more stuff going on. Better graphics and other stuff.
Tip of the day:
A big mistake a lot of you make is that wiiware games will be free.
Wiiware is just the same like the virtual console. Its different in that it offers new games instead of old console games.
I can think of some easy games ( Like tetris and some other in that direction ) that can be free but the majority will cost money.