"Average performance"? This arose as a result of admitted incompetence, which is outside the ambit of "average" unless banks are in the habit of hiring fools. All of which shouldn't matter because that's what internal control procedures are meant to handle. This is also ignoring the fact that "average performance" has nothing to do with negligence. I could for instance have a perfect record and still screw up such to such an extent that (A) breach my duty of care and (C) cause them harm, the classic test for negligence.