The question is now:

would, if the FM was set to cut out at 0.1g, the acceleration measured ingame at the same place as in RL corresond to 0.1g?

I do not know but I could well imagine that what is shown as 0.5g ingame as acceleration is something different from what was measured during the RL flight trials and might just not correspond to 0.5g in RL.

So perhaps the 0.5g could well correspond to the RL 0.1g case (tbc by devs). At least at this moment we cannot exclude as we do not know how the ingame acceleration is obtained.

Are we also sure that the ingame acceleration given is the acceleration in the symmetrical plane of the aircraft? or just a lateral acceleration hence including side forces?.