Yeah, Shroud's the most likely to be happy there. But n0thing, sgares and the new hipster semphis (who is extremely American even though he's Canadian)? I'm skeptical, man. No reason to choose Germany over England or Sweden other than the convenience it provides for their sponsors. I imagine Logitech has offered them a good, large and cheap house there for example.
But in Sweden they would be able to hang out with NiP and Fnatic socially and practice on LAN (Inferno Online), have optimal ping and live in a country where CS is mainstream culture. Plus they would be able to communicate with almost everyone without any problem. In England they would communicate like a native with everyone and would basically feel like natives. In Germany they would communicate with some, others not, while there being little CS culture.
The team is also full of Americans who can actually stand the cold weather.