Quote:
As gravity acts vertically downwards the aircraft decends with the resulting airflow hitting (for want of a better word) the fin area, with the fuselage acting as a lever arm, which in turn yaws the nose into the turn.
Exactly. In other words, it slips, which in turn causes the yaw -- exa.cnctly as BEagle described at the beginning of the thread. And what's more that still happens if you apply back-pressure. You can only avoid the slip by applying rudder, whether it's a level turn or not!
The quoted example above which you, Boookworm, say you agree with is talking about into turn yaw--you cannot prevent into turn yaw by pressing the rudder on the same side of the turn that just increases the yaw. You are confusing adverse aileron yaw with the further effects,. It dosn't happen if you apply back pressure and keep the aircraft level and what you will be demonstrating then is the effect of adverse aileron yaw.
An aircraft that is disturbed about it horizontal axis (without any aileron movement) will yaw towards the downgoing wing and produce no adverse aileron yaw.