I think that the comment about 'modern' music likes and dislikes playing a factor in piano sound preferences can be pretty appropriate. Having listened to and owned different Korg products I was never pleased with their acoustic piano sounds - BUT - I listened more critically to the radio for awhile and heard what I believed to be Korg pianos in those mixes that sounded fine. So - context was certainly a factor. At that point I also realized why my love of Roland piano sounds did not translate into the 'best' piano sounds for different music I was playing. As a stand alone piano Korg doesn't make it for me - but in context!!
Mike