My brother has the Cadillac CTS-V with that motor in it and there isn't anything on the streets that can hang with it. It eats corvettes for lunch. It's frightening the torque that thing produces.
I do believe Seven is marketing to the 40'+ center console market where money is no issue and the benefit is that you can run 2x557 rather than 3x300 or 3x400. Money and weight are not an issue for those people and neither is the gas bill. I don't think they expect to sell to people like us.
If we start talking about English auto and HP I think this will get moved to the bilges
I'll go dig up that I article I read a few years ago about how only the English could make a 4x4 that is under powered and get's bad gas mileage....