rambler35: Some interesting pointers, but why the obsession with such shallow DOF?
For example, the shot of the halved orange. Is this really the best way to show it? In this photo no part of the orange skin (of both halves) is in focus, and neither is most of the flesh of the fruit -- so we hardly see those textures at all.
If the reason was to focus and direct our attention to an important part of the image, then in this case it is to the small central core of pith -- which is not the most interesting or appetizing part!
But is it really necessary to have DoF so shallow that it isn't possible to actually make out what is on the plate? At least for restaurant reviews I think this is annoying, when the purpose should be to document what is offered rather than just being artsy.