I use Poser units*, so 0.1 displacement would be nearly ten inches! Yes, I'm a bump/displacement lover - I find the standard 0.009 values too small for my tastes, so I usually crank up bump/displacement to a ridiculous 0.1 or 0.01 initially, and then reduce it a bit. My ladies don't like me doing that with their skin textures!  ;o)

*Why? Although most values are shown in your selected units, some values are always shown in Poser units (e.g. displacement bounds iirc? I find the inconsistency annoying, and I can never remember which ones). And I'm fairly sure that all values stored in Poser files are in Poser units. So I stick to Poser units

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The 3Dcheapskate* occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.

*also available in ShareCG, DAZ, and HiveWire3D flavours (the DeviantArt and CGBytes flavour have been discontinued).