Well i aint sure about the US law, but in the UK its another story. It still sounds like a good deal and you would be getting a new engine. However it sounds like they are accepting its not your fault. I would take some legal advise see where you stand
I tell you if this was a story in the UK and you went to the radio, or papers it would make it in the news. I see so many T.V shows a year than name and shame garages like that. But as mjbliemel said
It still is a good deal but at the end of the day you bought a boxster to drive away not to brake down.
It might come under the customer rights acts... For a company to supply faulty goods you can use this right. but who knows.
Really hope you get it sorted out!