Mike,
For its time, it was one of the stronger pearls for true medium oil.
Maybe you are speed dominant, maybe you drilled it so weak that it handled much lighter oil, maybe ... But I still can't see a highly polished solid/pearl urethane being able to do the same thing that the T-Road pearl did.
I don't doubt that you saw what you did with the TRP, nor that it behaved the way you said it did. I do find it unusual.
If you do get the Supernatural, best of luck with it. It definitely has my interest, as a lower speed bowler seeing light oil far too often.