I don't think we have yet succeeded in identifying common terminology. You make the comment that for a wing made of a thin film, absolute camber is almost the same as absolute thickness.
I admit that this part was not well formulated, I was thinking about the spars that support the thin covering would add some thickness to the entire section… but I give you a point here…[8D]
Anyway, I think that our definitions are the same.
If you want to convince me, try to construct an intuitive argument that the chordwise variation in thickness somehow degrades the performance of an airfoil at low Reynold's numbers.
I've tried in my previous posts using the argument that the air molecules don't "see" a thin flat plate airfoil the same way we see it.
The air molecules "see" a thin flat plate airfoil with a positive AOA at very low Re's as it was a cambered airfoil, if you add a camber you may spoil the ideal airfoil at that low Re...