Fair enough... they suck.
Examples? Anyone? Anyone? Bueler? The only one I can think of that even has minor lag is Brawl, and only if you are playing someone in Mexico with a really crappy internet connection (a fact of all games).
I didn't realize having unprecedented developer support for a digital arcade service consituted a failure.
I didn't realize Ocarina of Time, Super Mario 64, Super Mario World, A Link to the Past, all the Sonic games, Super Mario Bros. 1-3, Donkey Kong Country 1-3, Kid Icarus, The Legend of Zelda, Metroid, Super Metroid, Ninja Gaiden 1 and 2, F-Zero, Super Ghosts 'n Ghouls, Contra III, Actraiser, Kirby's Adventure, 1080 Snowboarding, all versions of Street Fighter 2, Breath of Fire II, Harvest Moon, Super Turrican, Tecmo Bowl, Punch Out, Mario Kart 64, Sin & Punishment, Paper Mario, F-Zero X, Wave Race 64, Kirby 64, Golden Axe 1-3, Ecco the Dolphin 1 and 2, Streets of Rage 1-3, Virtua Fighter 2, Shining Force, Phantasy Star 1-3, Ristar, and Gunstar Heroes were all bad games.
Thank god we've got Sony around to give us quality stuff like... Spyro?
