Correct on a per capita bases Portugal has been growing much much faster then Germany. The simple truth it that Germany is not benefiting from austerity either. What should happen is that the German government massively increases spending. This would turn Germany from a net exporter, to a net importer. That allows the PIIGS to export products to Germany paying down the debt, but it also stimulates the economy. Germany profits from the increased spending as well.
The simple truth is that German life expectancy is declining since a couple of years(being below Spain, Italy and Portugal btw). Median wealth of Italy, Spain and Portugal is higher then that of Germany, which is only slightly higher then that of Greece. Real wages in Germany have gone up by 3.8% over the last decade(not annually but the entire decade).
The only ones who really profit from this austerity are the super rich. Other then that it is as bad a policy for Germany as it is for Italy, Portugal, Spain or Greece.