Rob, what bugs me with the video you selected is, it is so obvious that they hold back on their strokes, yet they play at a greater speed then most of us are able to do when we play at our full capacity.
Biggy, wow, what a great find, I learned tons through watching that! I never knew I could use the wrist to create spin, but from now on, I bet my serves will become a lot better! Is this possible the video JKC watched before he made his serving video?