Do you mean 15 minutes from the time Cirque ends to the time of your AR, or 15 minutes of IN THE CAR time? If it's the latter, yes, you would probably make it, especially if you valet park you car (so you don't have to walk 4 minutes from the parking lot.
If you mean leaving Crique, walking to your car getting out of the parking lot, then MAYBE, if you hit EVERY traffic light green (I believe there are 7, depending on where you park at DTD).