Steve. In the thread that you linked they also discuss the legal use of the decocker guns. Because the decocker guns lower to the safety notch(or whatever is the correct term), some argue that they only have to lower the hammer on their DA/SA with safety guns to the same condition as the decocker guns. This is usually the argument when this topic comes up.

C 15. Pistols must start from the mechanical condition of
readiness appropriate to their design and be loaded to division
capacity

The decocker guns by design lower the hammer to the point that they do. It doesn't state in the owners manual that you should next manually lower the hammer all the way down. Whatever position the decocker lowers the hammer to is the appropriate mechanical condition of readiness for that gun. Otherwise, why wouldn't the decocker just lower the hammer all the way down in the first place? The safety equipped models require that you lower the hammer all the way down. That's their appropriate mechanical condition of readiness.
The confusion on this topic never seems to end. I'd like to see a current ruling on it from IDPA again, also.

Mark