Actually, it's both. In this construction walkthrough video, they say the first 2/3rds they face front then back. Final third you're free spinning. (Start at about 2:14).
Yep. Here's what they said in a presentation last year -These are unique in that they aren't free spinning. Rather they are control spun. They are programmed to rotate at certain points so that the cars will be able to face screens for story telling reasons.