I also don't think that this map is accurate. While we haven't as many turkish immigrants in Austria as the germans, we have our fair share of balkan muslims immigrating.
Not that I care though, I don't mind if the majority of the people in my country beleives in god, allah or the flying spaghetti monster as long as I am free not to believe in any diety whatsoever.
On a sidenote: Alcohol isn't a strong point of finland. Of course, fins do drink, but my short visit to Tampere taught me two things: 1) finnish beer is expensive. 2) And it's basically a sweet weak brew with no manliness in it.
No wonder you prefer Vodka up there. Allthough I did like your "Gin" drink :P