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Anyway, Nintendo are working on loading times. The reason loading times are so slow on the PS2 is because the memory isn't fast enough to keep up with the processor, so lag is created.
The memory on the Gamecube is this super fast stuff, I forget the name, but it's the best there is. And working with the Gekko as well, it WILL work perfectly. So any slow loading will be fault of the disc drive, which is being worked on.
So, the Gamecube is VERY unlikely to have slow loading.
They said that they have sufficent RAM so that loading times arent a problem