This doesn't really answer your question but just an opinion: you'll find a variety of auditors within any CB even AIB (remember PCA). Some auditors are fairly easy in that they are not detail-oriented. They miss a lot. Some auditors are benevolently arrogant and with the rhetoric of a great orator bestow upon you their vast knowledge and expertise. They tend to ask irrelevant, esoteric questions. They miss a lot too. Even as they are annoying, remember the more they talk the less they audit. Then there's the QA police. That's when you're screwed. They are arrogant, detail-oriented, and assume everything you tell them is a lie.
My favorite auditors are detail-oriented, interested in continuous improvement, have an attitude of working *with* you, and understand the real world.