Atlus and Level Up held the official KOF 13 pre-release stream some time ago. If you missed it (like I did ><) Good news, it's up on Level Up's youtube page, so you can watch the pre-recorded stream. Definitely recommended, you can see the pro players playing and learn some tricks. I'm in the middle of watching it myself and I learned some tricks by watching how they play Clark Steel, and Joe and Iori.