Wow, this is a great thread! It seems to me that there's some 'cause and effect' going on here!
My perspective is this, FWIW:- The IATF have 'hammered home' the need to focus on CSRs. The auditor (in this case) was under duress since it was a witnessed audit, so their behaviour was probably forced into digging around this aspect of the audit. Of course, since the IATF (witnessers) represent the customers (in large part) they might have turned a 'blind eye' (if they even know) to the fact that customer requirements are often not communicated well (in the small print or not) or consistently (anyone notice the conflicting requirements in Chryslers PSO and the LPA documents?).
End result? Auditee gets a 'gotcha finding' which, had the auditor done the correct job of preparing and planning the audit, would have researched, communicated and confirmed with the auditee the nature of the audit criteria (CSR), before arriving to do the audit!
I would bet the IATF witness auditor never raised the lack of effective planning and preparation for the audit, with the auditor or their CB! I have a hat, I'm prepared to eat it, if proven wrong!