Originally Posted by BB_TX
I doubt that any of the trailers are weighed coming off the assembly line. The shipping weight is most likely the design weight of a basic and empty trailer, maybe verified by weighing the first one or two off the line before any options are installed. I would not be surprised if it was a computer calculated number based on all the the design details and maybe never actually weighed. That is certainly possible with the massive power of computers now. Our smart phones are far more powerful than the computers on the first moon lander.
I don't know the answer exactly but I do know that the sticker is not just a "one size fits all". Our 3790RD came with the Super Solar Flex package, and the sticker was more than 800lbs heavier than the floor plan weights on the website.
Now, did they use a computer model to calculate that? Could be; that sure seems possible.
However, I can say for sure it is not just a generice weight from a brochure or the website for a specific model.