Hi TimothyO -
Yup. I've done the same experiment twice now, one with a matched set of PDs about a year ago, then again about 2 months ago with two P1s. I have come to the very same conclusion. It's not even close, Gut/Poly wins the spin contest by a wide margin.
(9) Donnay Pro One | RPNY Pro Leather | 12.6oz, -12Points, ~335sw
Gut Mains, Yonex PTP Crosses, 60/52 lbs.