Have to say, there is definately slowdown on the GC version, not sure if its different on the wii.
Just finished it, clocking in at 34 hours, so theres plenty to do.
A ten out of ten game? In most ways, absolutely, but its nowhere near as good as OoT, sorry. I found myself being really let down by the dungeons, which heavily borrowed ideas from other zelda games. The only dungeons that I thought were awesome was the first one, the water one and the desert one, but even that borrowed heavily from the forest temple from OoT. The other dungeons were either too short, too linear or too easy. Just comparing them to the genius of the OoT temples, they were pretty rubbish. The last two were a joke.
I think the 8.8 IGN score got it pretty spot on.