For those sceptics who doubt the 'derotation' theory, please refer to
http://www.ukfsc.co.uk/files/FOCUS%2...Focus%2064.pdf for a fuller explanation of the centre of percussion and its effect on the perception of any landing (that link takes you to a pdf of the whole issue 64 of the UKFSC Focus magazine, the relevant article is on page 4). Really good landings feel good everywhere, but some bad ones feel OK at the front but even worse at the far back. Never dismiss the cabin crew's opinions, they are often better placed to judge. The article also explains why the effect is more evident the faster you are relative to Vref. Sad but true.