I think Case IH knows they are huge too, they try to use the tricks of the camera to hide its true size. Shooting from the ground on the opposite side of it, and trying to shoot at its slimmest profile when in view of it since its an oval.
Magnum promo photo. You can see by the tip that it is the Tier4F, they just moved the camera low enough so you dont see the DOC. I'm sure it was by accident though...
Promo photo from DPF side, perfectly inline to show the DOC's slimmest profile.
Promo photo for Steiger, lined up to show slimmest profile.
What it looks like from the side
I think the guy speaking could fit inside it.
Now as much as I am enjoying picking on the massive size of their exhaust (which from CNH's diagram suggests it is just the SCR catalyst, but they are using a DOC so possibly they are all in that can), what they did with the pictures is no different than what any other company in marketing would do.
It also appears that CNH is going to end up with the most simple setup for Tier 4 F across the board. I see on some engines they are using Turbo Compound which they have in the past, and it also appears they are using a water intercooler as well. Overall though it seems fairly simple. Deere's seems to be the most complex combining twin turbos (one VGT), EGR, DPF and SCR to meet the requirements. I can't find a final detailed image of what Agco is doing, but they say they will be using EGR on some models and will continue using SCR along with a DOC. Fendt is using twin sequential turbos (one is shut off while the other is running, versus compounded turbos like Deere where both are always running), along with EGR a Passive DPF and SCR. The Passive DPF on the Fendt scares me a little, but they claim it does not need replacement. Time will tell.