the DCCD equipped models have 35/65 or 41/59 torque split, but they do have mechanical centre differential and electromagnetically adjustable pre-load on clutch type LSD. So there is no way to adjust split itself, only the LSD action is adjustable. It may seem to the driver that more power is fed to the rear, but it is only less locking action if the switch is moved towards "open".

Adjustable split is on cars without mechanical centre diff that have RWD (or FWD) drive train with other axle conncted through some kind of multiplate cluctch which can be adjusted. this is the case with the GT-R's, 996+ Porsche turbo and C4, and some VAG transfverse engine/haldex equipped cars (if you fit aftermarket controller).

In fact it is common missconception that active centre differentials of Subaru, Mitsubishi or the world rally cars let you adjust torque split which is plainly not the case.