Bobad - that may well be true but then you have in use in the USA the terms "A level Cup" and what I would call that a "scant cup" . When measuring powders, most people fill the cup measure over ful and scrape off the top to have powder to the lip of the cup. When measuring liquids, it's rare that the liquid is ever filled right to the brim.

I'm accustomed to US measurements but I think weighing everything is better and using a large fluid ounce measure is best for fluids. That way you fill it to the line on the measure and don't worry about fractional individual cup measures and whether you are supposed to fill to the lip.