Depends on how the percentage is calculated and also on how the prop governor is controlled by the FADEC.
Assuming the percentage is calculated based on fuel flow (which it should be), and this being a diesel engine, by definition 13% means the engines are producing 23.4HP per side. This is a fair amount of power, 46.8 HP total.
If the FADEC allows for a very fine pitch at the higher power settings, the engine will spin faster but waste a lot in prop tip drag. If however, the FADEC sets the pitch to something more course in order to maximize thrust (which would be the normal expectation), then you will be producing enough thrust to allow an old J3 Cub to take off (slight exaggeration to drive home the point).
Overall, I think this has the potential to put a lot of wear and tear on brakes, and may mean the AE-3XX series of engines has a design weakness which the owners and pilots should be aware and should consider if landing at a high altitude airport, especially the twins with SEO considerations. Could make for a very interesting landing.
It still would not stop me from buying one if everything else lined up, but it definitely is a weakness in the design. Not sure what/how to fix the issue without adding lots of complexity for very limited return.
Tim