Sam, why should Permian be any different to FP......research sounds the key here like Mugpunter suggested.
FP/Napoleonville - Salt domes - no evidence that too many oilers were chasing the play and drilling the holes.
Permian Basin - tons of evidence drillers currently chasing the wolfberry play and drilling the holes.
Type into Google - "Permian Basin" and read the info, then form your own opinion on the plays involved.