Actually, the real definition at the moment is the computer rating and has nothing at all to do with the description of playing. So if she's a computer rated a 4.5, then she's a 4.5. In any case, we are getting far afield. I don't know why any of these threads are reasons for people to insult each other. Technique is not a religion. The only important thing is whether or not it works (though secondary considerations like tending to cause injury can come into play). I've explained why I don't think trying to hit topspin on most volleys would be successful, but I'm willing to experiment and see why it might be useful. Let's wait for the video and try it ourselves on the court.