Large doesnt = better.
And just to put things into perspective, Zelda has already beaten every single game on the 360 as far as reviews go from gamerankings.com, its the 4th best game of all time. Thats day 1 of the Wii.
The Wii doesnt want ported PC games anyway. Oblivion works 10 times better on its original platform.
Oblivion does have high loading times on the 360, its a fact. Its alot better on the PC though.