Yes indeed, good point CL300. The Equipped Empty Weight used by Dassault when specifying performance is a figure so far removed from reality that it is misleading. Accordingly a realistically equipped aircraft will never fly the quoted ranges, even if ISA, unrestricted climb and descent conditions exist.
Buyer of a new aircraft would also be wise to ask where electrical components used for customer selected options are going to be fitted to the aircraft. If in the baggage bay, for example, they will diminish available baggage volume and weight that may be carried, and more importantly effect on one's starting CofG.
Of course this is not only a peculiarity of Dassault, but considering the amount of options available nowadays one should look closely at the not so obvious implications of adding everything possible to any aircraft.