In a
comment below the article Britton says the Mk III is "slightly lighter" than the Mk II.
Personally, as an owner of the old 1D Mk III who is thinking of updating it, I think the new model needs to be more than "slightly" lighter than the outgoing one. In my opinion the weight already crossed the line from "OK" to "not really OK" in in the move from the 1D Mk III to 1Ds Mk III, even though the latter is my main camera.
I'm not sure how much heavier the current model is than my cameras. It's hard to know what exactly is included in the listed specifications (caps, battery, viewfinder rubber etc.). Perhaps I should take a set of kitchen scales to the dealer.
I get that the new cameras have extra stuff like GPS and Ethernet jacks on board, but in the modern world we do usually expect things to get lighter and more compact over time. I've seen pictures of the innards of these 1 series cameras, with their multiple circuit boards, and can't help thinking there are savings to be made.