Haha it's stuck in 2nd gear.

I've only driven one car with SS and that was a Tibby GT V6 (4spd SS) and in "D" it would not only redline higher but shift quicker. With SS mode it doesn't let you hit redline, it'll shift for you before that happens.

Really the only thing SS is good for is not acceleration but holding gears during turns and other semi-fun stuff.