Until fairly recently I used a "wet" measuring cup (you know, the kind with a spout ideally suited to liquids) for everything. Obviously, the design is not great for dry ingredients (say, flour), which is why I went out and bought myself a set of dry measuring cups when I started making pizza dough regularly. I offhandedly mentioned my previous method while paying for my dry measuring cups, and the guy at the store looked horrified. In fact, he told me that the volume of the two kinds of measuring devices is different. (So maybe my dough and brownies would be totally different with the new appropriate equipment....)
I'm inclined not to believe him. Everything seems the same to me. Does anyone here know for sure?