What I was really getting at was - "has ride performance in turbulence improved in later generation planes?" as I thought the ride on a 777 was great in turbulence, whereas the old 727 used to rattle my bones.
Sure, later model aircraft provide a smoother ride as the wings are less rigid. The 777 wing allows for more flex as opposed to a rigid wing 727.. Been allways told that corperate jet's get beat up the worst for this reason, some commuters too. Stubby little wings that translate the up and down drafts at hard frequencies.