Do the included printer profiles use a too high limit for the volumetric flow?  

Do the included printer profiles use a too high limit for the volumetric flow?

I have a specific model which a sliced for my default 0.4 HF nozzle and then a second time for a 0.6 HF nozzle. The estimated print time was reduced to one half.

Note, this is not a question whether a 0.6 nozzle always leads to faster printing times. I am aware that the effect depends on the model and that there are a lot of models where a 0.4 or 0.6 nozzle won't make a difference. This is not the point here as I have a specific model which largely consists of straigt, thin walls (~2mm) where the larger nozzle can actually play off its strengths and the slicer has already estimated a considerable gain.

I intend to print the model with a high-temperature filament like ASA. However, I have seen a lot of reports which claim that the printer and filament profiles in Prusa Slicer are using a too high volumetric flow limit. So the calculated reduced printing time is a false alarm and overly optimistic as the hotend won't be able to heat up the filament fast enough. Those reports say that a 0.4 HF nozzle and the gantry speed already max out what the hotend can melt.

The printer profile for a Core One with an ObXidian 0.6 HF nozzle and the filament profile for Prusament ASA will lead to load errors and a failed print. Allegedly, one has to cut down the volumetric flow limit in the profile to 50% of its original value to avoid a failed print. However, this will obviously lead to a print time identical to that of a 0.4 HF nozzle. So while the larger nozzle lays down thicker lines and higher layers, the corrected volumetric flow limit makes the slicer do so at a drastically reduced travel speed for the gantry to avoid overloading the hotend.

Is that true? Are the original printer and filament profiles broken? Is the slicing result