Sounds like what we need is a scientific test ... anyone planning to replace their shocks anytime soon who could do this?
You'd need a test road where you can drive at the same speed before and after the test (so ideally avoiding traffic holdups).
And you'd need some kind of ride quality test rig. Ideally this would be some fancy gyroscopic interia meter, but I'm guessing that no-one here has one handy! Instead, maybe something like a full plastic cup of water in a bowl in the passenger footwell, measuring how much water gets spilled on each pass.
You'd then do three runs on the test road before the shock change (filling the plastic cup each time), and measure the total amount of water spilled.
You'd then repeat it after the shock change.
Anyone up for it? Anyone got a better test plan?