I don't want to speak for FriendlyFire but I think I can safely say they are also actively working on the fight. FriendlyFire has historically proven itself to be a quality guild of progression raiders through the brief history of this game so far. Outside of that, I doubt other guilds are working on Kephess but I honestly don't think any other guilds have beat Tanks on 16m yet (if they have, they aren't reporting here or on server progression threads).
You pretty much summed up what I think (I don't speak for the entire guild but the majority would agree with you). We made some good attempts on kephess tonight after not having any runs since last Wednesday and it is safe to say that it is a hard fight and that damn trandoshan phase CANNOT be easier/on the same level as 8man.