I don't remember where I got my version, but it's not the boxified version. You might have the boxified version (where bricks with bricks above and below them have been converted into boxes). On my work computer, LDView displays it at 4.6FPS with default settings (7.5FPS with stud textures turned off). For comparison, LDView on that same machine display's Orion's 10030 model (3020 parts) at 15FPS (18.7FPS with stud textures turned off). So despite the high part count of datsville, the part complexity is relatively low.
