Tony,
First let me say I have both the S950 and the new Korg PA600 on order and believe they will be just fine for what I do.
What I believe is two things. First, these two much cheaper keyboards will do all most gigging players need. Second, if you read the Korg forums you will find a lot of posts complaining about hardware problems with several of the Korg keyboards plus some posts complaining about the latest Korg OS updates. Perhaps that is driving the sales from owners.
Spending $1000.00 or even $2000.00 for a keyboard that now does what only the TOTL keyboard would do 5 years ago seems a no brainer for me.
Deane