Grats Paragon on the world first and 10 man world first kill. Like someone said, they stomped face in 25 man and continue to do so in 10 man. So it doesn't really matter which format they raid, because quite frankly, they're leaps and bounds above every other guild when it comes to coordination and skill. The whole 10/25 man thing is old. So let's congratulate them and see who gets the 25 man world first!
EDIT: Oh yea, does anyone know if a mount comes with it? I know T14 didn't have a specific mount that dropped off a heroic boss, but was thinking maybe they would start implementing that again in T15. Maybe they won't do it again, who knows.