Ian, you don't play Korg's much yourself, either. Yet you are PERFECTLY willing to say there's not enough of a noticeable improvement. All I'm doing is the same...

I'm pretty sure there's enough of a noticeable difference for Korg users to have them want to move, especially those with a PA1x or PA80. As quite a few have said, the difference between the T3 and T4 may not be enough for many to want the expense of the move, either. And that's from people who HAVE a Yamaha, not people unfamiliar with them.

Like yourself and Korg, for instance...