There's been a thread about this, you can read here:
pekiti tirsia kali vs krabi krabong
George, I heard the same thing about Muay Korat when I asked thai teachers
aout it. Korat teachers tend to keep things low and quiet and will even say they know little or that they don't know it if they don't know you.
That's how it works in Thailand, and it's yet another example of kru Praeng's
propaganda and selling plans.