Well, I think Steve made pretty clear: they sell. That's all. If all the world decided to dislike smaller keys, Yamaha would change their standard size for PSR keyboards, you can bet on it. Very simple.

Sure I appreciate a good full size set of keys (when I bought the Tyros I had the opportunity to test how better the 9000 Pro or the Ketron SD1 both felt in my hands), but for its purpose (my own amusement and some musical jobs) an arranger keyboard with the Yamaha standard key size is completely acceptable for me, especialy taking in consideration that in the final compromise, the weight is very important. The only real disadvantage is to adapt to a pure piano playing technique (which is not the main specialty of these keyboards). But for that specific purpose, I will look for a real piano or for the best hammer simulation mechanism I can find.

-- Jos�.