It’s an old topic; the only difference is now with the harmonization of the EU (access to information) and the German tax authorities clamping down such stories bubble up. When Germany passed their capital gains tax years ago, Lichtenstein and Luxembourg became tax shelters and made billions as people were rushing their money out of Germany. It's one of those great side effects those preaching all the worlds problems can be fixed with another tax and government program didn’t foresee.
The US have cleared their positions with liechtenstein earlier on - US citizens could not use the same obscuring tactics that liechtenstein offered to the german pepper bags because of bilateral agreements.
In general I can see that US tax authorities have more of a punch then the germans.
Now that germany is awke, it will demand the same deal from liechtenstein.