Modern table tennis is predominantly characterized by looping – looping backspin balls, looping topspin balls, looping serves, looping over-the-table, looping blocks, and re-looping loops.  The Chinese national team did a study on various loops.  The study showed that the spiniest loop against backspin tested had about 120 rotations per second.  The spiniest loop against topspin tested had about 130 rotations per second.