I don't think he got away with it. He did spend a year of his life in federal prison, and he'll probably have a very hard time ever getting another job now that he has a reputation for stealing confidential information (anyone who ever searches for his name on the web will immediately know). And Goldman Sachs could still potentially sue him for damages, breach of contract, etc.
On the other hand, I think it's an extremely good thing that judges get upset if the government tries to send someone to prison who didn't commit an actual criminal offense.
On the other hand, it's not entirely about him getting away with it; as I read it, he's still open to a civil suit, but the judge likely (hasn't written his opinion yet) thought this didn't justify criminal charges.
