In belgium for instance the sale tax is 21%. I believe in holland it is 19%. You should'nt look at the euro as something experimental. It is a done deal, nobody can back out. Years before the currencies were already fixed between the countries.
Also the recession has hit european countries much less then the USA. Here in Belgium the speak of a negative growth of 0,05% which is the same as 1993. And we all survived that year.
By the way Germany is LEGO's biggest market (not in size,but in numbers of boxes shifted.)