but they do look cool IMHO 
Honestly, this should be the only reply and the thread should be locked. People don’t buy OSPW and fancy ceramic bits for performance. They buy them as bike bling…
This. I helped a friend do aero testing on his OSPW and they were marginally slower than standard Shimano pulleys; I assume because of the additional size.
We also think that the Shimano kit had more consistent accurate shifting.
I’m surprised that conventional testing could pick something in this area of the bike up ? (that far back, that turbulent and that small). What was the difference in CdA ?