Range very much depends on the weather, terrain, and how you drive it in much the same manner as on any vehicle. The test procedure sets some fairly specific conditions, and if you replicated those, I'm pretty sure that you'd closely match their numbers. One of the bigger hits to range is cold weather where you do not set a departure time and precondition while on line voltage. Unlike an ICE, the only way you get heat in an EV is by drawing watts from the battery. Add in the fact that batteries cannot supply as much of their stored energy when cold verses warm, and that's the biggest draw down on the range.
It sounds like the OP does not understand EV's, or realize that like on ANY vehicle, the miles you can get out of it very much depends on the conditions under how it is used which includes the operator's actions.