WoW started with both Molten Core and Onyxia, and Blackwing Lair wasn't far behind. It was a big friggin' deal when the first Onyxia kill happened on my server, and it was months after release. There are guilds in SWTOR now, who have cleared everything, and did it in the first two weeks. These aren't bleeding-edge raiders, they're groups of friends with probably a little too much time on their hands over the Christmas season.
SWTOR's endgame got rolled over by chumps. It's nothing.
That's the name of the game, now, though, I guess, what with how Dragon Soul turned out ...