Andrew,
I just got Denny Torgerson's monthly newsletter; in this issue he starts talking about how to play the 5 PBA patterns. Of course, I can't copy copyrighted materials onto the internet; besides, inthis issue he only talks about patterns A and B. Additionally he is publishing a "publication" called, "Bowling on the PBA Patterns" for $34.95. His publications are usually worthwhile.
Anyway, of major note in his newsletter is this little tidbit, which, I briefly touched upon, myself, above, and I paraphrase, so as not to get caught in copyright issues: the lane surface and the type of oil can cause the PBA patterns, as defined on their webpages, appear to play differently to one degree or another.
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"We get old too fast, and too late, smart."