It all depends. Usually the orders are only TDY. Sometimes however, and it seems like it's a very random few, people do get PCS orders to API. I've had friends get them and their situation and mine were the exact same; I received TDY however. So yes, it is possible your orders are PCS. If they are, consider yourself lucky.
Another thing to take in to consideration is how long you're going to be down there. Once you've hit the twenty week mark (the day you check in counts as day one), you can have your orders modified so that they are now PCS orders. That's what happened with me and it worked out pretty well. I moved around 1200 lbs down there knowing that I would only be reimbursed for 600 lbs. Once my orders were modified though, I was now entitled to receive money for everything I moved down there. Gave me just over an extra g which was great for the hookers and blow.