Upload & Sell: On
Worth a read from Rob Galbraith's review, site still up. He found the following,
All of the above assumes the use of lenses like the AF-S 24-70mm f/2.8G, AF-S 70-200mm f/2.8G VR II, AF-S 400mm f/2.8G VR II and AF-S 200-400mm f/4G VR. What these all have in common is a maximum aperture of f/2.8 or slower. I've struggled to achieve the same level of autofocus performance with Nikon's f/1.4 lenses, including the AF-S 24mm f/1.4G, AF-S 50mm f/1.4G and AF-S 85mm f/1.4G. Even when the working aperture is f/2.8 and therefore shallower depth of field is not a factor.
As of this writing, I've not sorted out why f/1.4 lenses seem to bring about poorer AF system performance with the D4, or if there is a magic combination of AF settings that might alleviate the problem. With this camera, like the D3S before it, I've sidestepped the matter entirely by focusing in Live View instead. This has been a manageable workaround, at least for static subjects, but it's not much of a long term solution.