Sorry, been busy at work...
Here is a list of the top teams in MMA.
Xtreme Couture: Striking coaches, Ron Frazier, Sean Thompkins. Boxing, Muay Thai respectively.
Greg Jackson: Mike Winklejohn kickboxing (muay thai, MW is a former muay thai champ and Greg Jackson's only coach. Winklejohn, a former karate stylist, teaches Muay Thai.
AMC: Founded by Matt Hume and Haru Shimanishi. Haru, a former karate stylist, became a muay thai fighter and has opened two HMCs (Hawaii Martial Arts Center). He was Maurice Smith's coach during Mo's heydays. (Still can't make me into a stand up fighter, though.) Muay Thai
MMA Lab: Founded by Royce Gracie, a Fairtex center, head striking coach, Adam Gillespey, student of Walter "The Sleeper" Michowlski. A student of Kru Vut Kamnark. Muay Thai.
Minnesota MMA: Home of Sean Sherk and Brock Lesnar. Head coach, Gregg Nelson, student of Arjarn Chai Sirsuit, Muay Thai.
ATT Florida: Striking coaches, Howard Jackson (1976 gold medalist boxing) and Cristian Toleque (Muay Thai)
Undisputed San Diego: Striking coaches, Roberto Garcia, Jovan Jones, boxing. Kru Anan Borigut, Muay Thai.
Boxing Club San Diego: Head striking coach, Melchor Menor, Muay Thai world champion.
Chute Boxe: Rudimar Fedrigo, Muay Thai.
Black House: Home to UFC champion Anderson Silva, Vitor Belfort, Big Nog, Lil Nog, Nino Schrembi, and LYOTO MACHIDA. NO KARATE ON THE CURRICULUM., started by Anderson, Carlos Barreto and Big Nog, previously called the MUAY THAI DREAM TEAM.
Team Quest: On both Team Quest curriculums, no KARATE listed, but guess what, they have MUAY THAI.
At Legends MMA: Even though Bas was involved with founding it (he and Randy were only figureheads), interestingly enough, there is NO KARATE taught there. And yes, Bas was a karate black belt, but why no karate?
Big John McCarthys Ultimate training center: NO KARATE on the curriculum, even though one of the instructors is a Karate black belt. Guess what they do have there, you guessed it, Muay Thai.
Matt Serra's striking coach: Ray Longo teaches Matt boxing, and MUAY THAI.
So in summation,
UFC lightweight champ trains in boxing, muay thai (Sean Sherk)
UFC Welterweight champ trains in boxing, muay thai (Matt Serra)
UFC Middleweight champ trains in muay thai (Anderson Silva)
UFC Lightheavyweight champ trains in boxing and muay thai (Rampage Jackson)
UFC Heavyweight champ trains in boxing and muay thai (Randy Couture)
Rather than post video after video countering RKBB, I thought it would be best to just show people what PROFESSIONAL fight teams are doing, and let them decide themselves.
Intersetingly enough, a few examples given by RKBB as karate fighters, Lyoto Machida, GSP, Bas, former Karatekas are training guess what? (BTW, Kru Phil Nurse is GSP's head striking coach, and he doesn't teach him Karate)