This does not necessarily mean there is an exploit going on. It reads that they are investigating, not that there is an exploit. There might be an exploit; however, from my experience on beta weekends, once you have a dedicated group you can win the WZ extremely fast and requeue.
Also form the posts, the people in game are saying that the exp is earned from a WZ closing. Now they should not be getting full exp for a game that ends as soon as it begins, (BioWare should fix this) but this does not mean people are exploiting. I will constantly queue for WZ once I am level 10, not to exploit, but to PVP. It is not a players fault if they are continuously put in a WZ that ends due to lack of players.