I must confess that I haven't done a survey, but just based on my experiences with the financial audits, typically in the course of an audit the Auditor General folks will issue management letters. Often they will come across transactions or situations that had escaped the attention of management. There are millions of transactions at play sometimes, at least where I was. We appreciated getting those kinds of heads-up on things that had not previously come to our attention.
On November 2nd, 2010. See this statement in context.