Not sure about that, as taxes are very individual it does not make much sense to give a post tax number. At least Germany it's not common to compare post tax salaries.
In the UK, it's always gross, pre-(employee-paid)-tax yearly salary.
In Slovenia, on the other hand, it's usually net, post-tax, monthly salary.
I don't think so. I haven't seen a European country a where you usually discuss your salary post tax...
As I posted elsewhere, Norwegian salaries are always pre-tax but are substantially smaller than for similar positions in the US.