When you were a kid, someone probably asked you this "trick" question: Which weighs more: a ton of bricks or a ton of feathers?
The next question is: Which would be harder to transport on a bicycle?
Of course, the question "behind" the previous question is this: Which is harder to transport on a bike: weight or volume?
In all of my years of cycling, it seems that the questions and concerns I've heard about carrying loads on bicycles had more to do with weight. Some are looking for ways to carry less of it, while others are trying to carry whatever weight they need to carry in the most effective and stylish manner. I'd say that my transition from the former to the later parallels my transition from a young male racer wannabe to a middle-aged woman riding to work in skirts and heels and on weekends in casual clothes. I used to do whatever I could to carry nothing, or as little as possible, on the bike. Now I use canvas and leather bags to do the job because I like the way they look.
But, to tell you the truth, I--like most cyclists in the Western/Industrialized world--have thought very little about how to carry pallets of styrofoam on two wheels.