In the past I was sceptical about carbon seat posts and I was not that keen to spend 100s for the look. Unlike some people who spend lots of money on a carbon seat post and may need to psychologically justify it, I bought mine for only 22 euro (a clearance sale) in a shop in Nice during a recent holiday in France. I tried the new seat post last week for the first time and during the first mile I felt no difference, but then there is a section that has some crappy road not far from my house, and I remember that I rode through it fogetting for few minutes that the surface there is not smooth and then thinking wow, this is much more comfortable. I must say that I changed the seatpost on my (alu) Giant road bike that has a very harsh ride. But since last week it is significantly more comfortable. So far I did not have a chance to go for a long ride, so that I can evaluate the state of my arse as a function of dumped vibrations.
My conclusion - it is a fact no a fiction (sorry fication)
Pluto