Lets not forget that the Ford that won benefitted greatly from having a shed full off new / minimal use rubber thanks to their early DNF yesterday, allowing them to three stop with new rubber each stop. A far greater and more impactful benefit than any parity consideration.
Im not a follower of either GM or Ford so have no parity grudges either way. I just feel that circumstance played as much / more of a part of today's result than parity.
Actually I think this might be the first post (that I remember anyway) I have written about parity