..."Perceived simplicity is not at all the same as simplicity of usage: operational simplicity. Perceived simplicity decreases with the number of visible controls and displays — Norman..."

This is Golden - how often external stakeholders (clients) and internal ones (CXOs) keep arguiing about this notion to "simplify" by making it look "clean, minimal and clutter-free". I am going to start quoting Norman on this moving forward :)