Flower Pot -- 1D III & EF 85mm f1.2L @ f2.
I have't really tested all focus modes of the Mark III, but for the little tests that I have done, so far it seems at least on par with my 1D IIn, in terms of focusing accuracy. The Mark III has a slightly larger buffer and everything seem a bit more responsive. Just love the files from this camera. Very clean. In truth, there isn't much difference in image quality between the 1D IIn and the 1D III up to ISO 400, but at higher ISO, the Mark III is at least a stop better.