It seems like the EU, and Germany in particular, takes privacy much more seriously then the US. Even without encryption, it seems like it's harder for authorities to do casual snooping on email contents in the EU.
Actually, the opposite is true. In Germany, every e-mail provider with more than 10,000 customers has to maintain an eavesdropping infrastructure that essentially allows for warrantless snooping, which can be authorized by any prosecutor, and carried out by every police officer. The provider is gagged and is not even allowed to disclose the number of cases. I'd assume that other EU countries have similar laws.