Here'* a video of the CTS from 0-70 MPH. It'* a tad bit under 7 seconds it looks like. It'* hard to tell for me though because I don't have a stop watch.
I know the speedometer says 5 MPH, but I actually wasn't going that fast. I was barely rolling at maybe 1 MPH. The gauge jumps right up to the 5 MPH line at anything more than a dead stop pretty much.
I forgot to have the car in sport mode. In sport mode the transmission would shift through the gears a little faster and timing is increased for better performance. The reason why the car won't spin the tires is because this car is fly-by-wire. It won't let you do it. :(