No, they didn't rotate.
I wish I could have filmed a POV of it, but my camera battery died & the park closed three days before the kid & I were going to go back. Here's the POV I filmed of the ride (Monstars of Rock) after the park changed to Freestyle Music Park, where you can see that the cars didn't rotate.
[youtube]http://www.youtube.com/watch?v=4a65aSFnkaw[/youtube]