well i think that the core makes a difference for the first half of the lane and the coverstock for the other half. yeah i know that if you drill a ball with the pin on pap and another one, but the same exact ball, at 5 inches it will be the opposite. but for example, drill a storm fast,furious and natural all with the same layout and tell me what you see. they all have the same core but different coverstock and their reaction are totally different. but on the other side put different layout on them and maybe you ll be able to have similar reactions. i would say that you are both right on some points.i know that usbc have made plenty of research about that (rg number, diff,coverstock,....) so there is probably something interesting to read about that debate!
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Mathieu Beaudoin
JR team canada member 2008-2009