Right now I would wager the Hellcat is the fastest stock sedan. The RS7 is fast but it stock trim it is not pulling low 11's. With a few mods sure but not stock.
But it is like 175% the price. And that's what makes this thing a beast. It is cheap HP. Sure we can make our cars compete against it but not easily and cheaply with full warranties. Hell, I can take a 06 STI and turn it into a 10 sec car for less than the cost of our cars. Doesn't mean I want to drive one.
For the price it is a good deal. I think we are seeing these cars as the last 'hurrah' before we lose the big monster gas guzzler motors to the new fuel requirement laws that are just over the horizon. We will see some new hybrid, electric and even hydrogen cars hitting the showroom floors soon.
Some will give the terms "sport" car/ sedan new meanings. Like the P1 and the 918 are doing in the supercar world.