Lots of opinion on this thread, everyone's entitled to those.
Very little fact or data though.
The shock speed is not too hard to calculate. Landing from a large jump, i.e full rebound to full compression, will be about the fastest shock speed the car sees. Piston has to travel the full distance, time for this is in the region to 0.05 to 0.08 seconds by my observations and timings. As a sanity check this equates to the region of 3 to 5 Hz, which seems about right (I will be taking some measurements of my B4 to work out its natural suspension frequency soon).
On a B4 the rear shock travel is 26mm, so speed based on the above timings is 0.32 to 0.52 m/s.
If you look at the Ghea data the damper is already starting to be progresive at 0.5 m/s and the difference in the damper force, from highest to lowest, is 50N down to 40N. This is a 20% drop so a significant change and you would expect a real difference (not saying whether it is better or worse) on the car, especially as the change in force at the lower velocities is much smaller.
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