Interesting observation Dan. I have not noticed that much of a difference, but understand how you are likely correct.
Last night I started with my OOB VG drilled pin uncer 5 x4 shot 258. Struggled with it the second game on carry down for some reason shot 171. Picked up the polished Nano drilled 5x5 and shot 256. Nano got through the front of the lane easy and was relatively smooth, but continuous off the dry. Carried everything.
I may try the Nano Pearl out of couriosity, but the polished Nano acts very much like most pearls that I have thrown, only a little smoother, and more continuous off the spot.
Those that can do. Those that can't complain. Pimpin ain't easy, but it's mandatory.
Most things we like, we don't need. Most things we need, we don't like. Don't confuse your likes with your needs.