I take you ypu have never been to Europe then
Yes I have been. And the comment was made in jest, though apparently, some of you on the other side of the pond are a bit stiff and lack any sense of humor.
Majority of the EU nations' drinking age is 18, which still = "teen"agers. To me, that's still young (though I would even argue 21's not much better).
Regardless drinking age, truth of the matter is that Europeans are a little more lax on the idea of alcohol. That comment doesn't mean you all are bunch of alcoholics. So right back at you.
I don't know where you got that idea from, but I suggest you research it a bit!
Apparently, alcohol is a touchy subject in UK.