Maybe your Hunter was good or your other members were undergeared. On average, yes Survival Hunters were top DPS, but they were very close with everyone else in the top 8. Not only that but Survival doesn't scale nearly as well with gear as others. Explosive Shot, Black Arrow, Explosive Trap, and Serpent Sting all scale with RAP and not weapon damage.
As it stands now, it looks like Marksmanship is doing more DPS than pre-patch Survival. Where's Blizzard's explanation for that?
Survival was over powered. Nothing too it, there was NO beating the two hunters in my guild(Environ/Grimlokk) and you didn't need to be extremely geared to do high DPS as well has have amazing mobility on bosses. If MM is the new better spec then whats the problem? One of our hunters tested MM on Argoloth was doing 24k DPS not a big difference then when he was surv doing the same.
As for me, http://us.battle.net/wow/en/character/dragonmaw/zerhule/simple is still doing fine with enhancement DPS. Getting into the 20k DPS range at the start of a fight and evening out as mechanics play into it.