Random thought, to all those keeping up with E3... it's actually extremly likely that SNKP will work out some kinda PS3 to PSVita support for KoF XIII console release at this point.
They seem to love the PSP enough already, and that'd be a good way to extend the games userbase a bit.
Doesn't matter to ME (as I'll be getting it 360!), but I'd love to see their home port and online be able to get a bit more breathing room thanks to more ways for people to continue playing it.
Mr. Soulstar, I can't give any XIII specific advice, but I can tell you that the best way I had to keep from doing Hao sho kou ken when trying to do a Zanretsuken, for me, was just to make the motion very pronounced (making sure not to do it too fast), and to let the stick go back to neutral before starting the motion, and sticking the last "forward" at the end. That tends to work for me on all the older games, so maybe it'll help you here?
And Joe, he looks pretty good in XIII, doesn't use meter much to do great corner damage combos, has pretty safe movement options, solid projectiles, good normals for comboing easily, and solid DMs. Tiger Kick isn't as stupid-invincible in this game as it was in XII though, and that seems to keep people from playing him as much?