[alentred]

I have a colleague who comes from a culture with a T-V distinction and lives in France where it also exists. But the line we would draw between "toi" and "vous" in French is quite different from his culture: he apparently has a more formal "framework" for T-V and he uses "vous" much more often than others would, so it often creates some distance.

So, T-V distinction is also very cultural in a sense where the line between the two is.