I have read that too Rich but Pacific Seacraft is known for building a good blue water boat and I believe there hardware is oversized.
I'm not sure I can really explain or know what to do with this knowledge.
If you pull a chain plate and it looks like it is in perfect condition but it is junk and there is no non-destructive way to tell what do you do?
Fatigue is characterized by microscopic fractures in the 'grain' or surface of the base metal. Fatigue is evaluated by microscope, by magnetic or dye-penetrant methods such a 'magnafluxing' or other metallurgical analysis.
No one is stating that PSC built lousy boats ... ALL metals in cyclically loaded applications that exceed their 'endurance limits' will FAIL (sometimes catastrophically) by fatigue FAILURE.