Mine works fine for what I shoot, so I'm not bothered. Also was there not a test somewhere against a Nikon and they both got about the same hit rate on moving subjects?
I would be happier if Canon made some wide lenses that were worth trying to focus on static objects.
That's OK, soon you'll be able to buy some Zeiss lenses that'll fit straight on.
My 1Ds3 also focuses perfectly well for everything I shoot