The marketing materials I had gotten from my dealer. I don't have them anymore, since I bought my car a month and a half ago.

I'm no mechanic and am just beginning to learn this stuff...so I couldn't tell you whether the claims are correct or not. I know that when I was looking to buy, I knew the previous MYs were 240 hp and this one was 260 so I had also asked the guys at the dealership and they said it was because of the new generation supercharger. But maybe the info you are looking for might be available from Eaton's website or via an e-mail inquiry to them at:
http://www.automotive.eaton.com/product/engine_controls/supercharger.html