Those cars are not even in the same class, of course Tesla would outsell them. Compare sales of the model S in Germany with the C class, BMW 3 (or maybe the 5) and just forget about Porsche.
Other cars you could compare it with are larger sedans of the premium variety Japanese manufacturers (Toyota -> Lexus, Nissan -> Infinity).
I'm really happy to see Tesla make moves but if you're going to make comparisons it helps if they're apples to apples otherwise you just make Tesla look bad.
Downvoters are encouraged to spend some time behind the wheel of an S class (even a 10 year old one will do) and then to go drive a Tesla for a bit.