Far away. Cata heroics are still extremly hard compared to WOTLK HC's. Yes I know I used the word extreme, but lets face it.. wotlk HCs got to a point where they were a joke, all about doing it faster. Hello killing a boss in 10 secs is awesome.. and if they didnt die in less than 40 secs group sucks etc...
People 3 man heroics before Ulduar aswell I belive.