It wasn't a joke. I no longer play WoW, so I apologize if this is no longer the case.
When I played, Locks could solo a number of things, but it was never anywhere close to what Pallies/Hunters/DKs could do. So I apologize again if I've spread any misinformation.
Ah, thanks for clearing that up. You're right, typically the hunter is well equipped gear wise. And sure.
http://www.youtube.com/watch?v=kNWIdA7-LCQ
That's a video of me tanking Heroic Morchok for my guild when it was still technically current content. I'll admit that we out geared it as we had already beaten heroic deathwing at the time and there was the 30% buff.
http://www.youtube.com/watch?v=dj6Tq3meaU8
That's a video of me soloing Festergut at level 85. From what I know/knew, there were only two other known people to do so before me (A DK who's name slips me, and I believe the other was Caribald).
http://www.youtube.com/watch?v=lUIik1vxBYM
(part 1 because I was DPSing really slow during the video)
http://www.youtube.com/watch?v=hrmXeETkDm8
(part 2)
That's my solo on Heroic Wise Mari at level 90. I apologize as I do not remember the name of the dungeon.
http://www.youtube.com/watch?v=42pmClXdVYI
That's a video of Mionelol soloing Atramedes at level 85 (I believe he did so just one tier after Atramedes was current content).
I made a guide on the US WoW forums awhile back to help hunters solo as much as possible which actually received a sticky.