According to guildox (I'm bad and can't post links) The Typhoon Struggle - Defias Brotherhood-EU just got the world first strict 10man H-LK kill.
Congratulations to them.
Edit; "Strict" is using only gear avaible from ICC10. (Not sure how it works with crafted/emblem gear).
Edit2; What are the 10-man 'strict' guild rankings?
The 10-man strict rankings show the achievements of pure 10-man raiding guilds. A 'pure' 10-man raiding guild is one that does not participate in 25m progression content. We recognize that 25-man guilds or guilds that regularly participate in 25m pug runs often have a distinct advantage since they can gear up at accelerated rates and move faster through 10-man content. Consequently, our 10-man strict rankings exclude guilds which access any 25-man content that offers higher ilvl gear than what the current 10-man normal content provides. If you are a 10m guild that has members which want to run 25 man pugs then the 'strict' classification is not for you.
(Taken from Guildox).