From the quoted article.......
According to Ferrari the new system is based on the traditional RWD layout, with the second pair of wheels selectively connected via their new insertable transmission system. Instead of being an all time four-wheel drive system it should rather be viewed as a means of traction control. The all-wheel drive will only interfere when the rear wheels loose traction, and IF the option to have the all-wheel drive engaged is switched on.
The systems will only reduce drive train efficiency when they are in use, unlike the system used by Lamborghini. Furthermore, it will ensure that the new breed of Ferraris will have superb handling characteristics in all weather condition, with minimal understeering and oversteering.