Don't need any articles to tell you this is bunk. The power available in a sine wave is based on the shape of the waveform. The moment you start clipping the wave is the moment that you start losing power. Some things wouldn't care much - a light bulb for example. It just wouldn't be as bright. But other electronics, and yes motors, aren't going to be very happy. You can't get something for nothing. BTW, clipping creates terrible harmonics that can fry electronics.