Andy, while I agree that people MUST read the standards as the "first line of defense", sometimes people have genuine confusion because they might have had some involvement in a previous audit where an auditor might have asked to see a business plan, as mentioned in post #4 of this thread, for a TS16949 audit.
Further, remember that, the standards that apply to the CB's and their auditors ask for certain things that are not covered in the standard the registrant is being certified against.
A couple of examples: nowhere in ISO 9001 the term objective evidence is used. However, day in, day out organizations get written up against lack of objective evidence of a certain activity or requirement happening in their management system. Where does objective evidence comes from? ISO 19011.
AS9101D requires a registrant to show 12 months of performance data during a stage 1 audit, as part of the readiness review for the stage 2 audit. Nowhere in AS9100C such requirement exists. Many similar examples abound.