Not sure about that .. I saw the cars close up and nothing really jumped out at me. If that was the 2012, then it was underwhelming, adj upper bulkheads, gear diff, the chassis was slightly different but not much. I saw one of the cars with the top deck mentioned back a ways in this post. Unless of course they switched cars sometime during the race .. but doubt it.
Here are some links to pics taken at the race.
Pics 370 - 375
http://www.rc50.com/modules.php?name...bum=67&pos=369
http://www.liverc.com/photos/albums/...6-DSC_0369/lg/