It CAN be right, if you consider how LEGO counts pieces. A minifig with no accessories has three pieces... then add shields, helmets, neckwear, weapons, etc... then add all the little details (technic pins, horns, flames, and all the little stuff....) when you finish, you will surely have your 2500 pieces... In models with such detail it is easy to add up pieces fairly quickly... When I made my first guess of the number of pieces, I came up with about 1800.... but I hadn't considered that, for example, skellies count 6 pieces without any type of accessory, Trolls count 8 pieces with no weapon and so on....