I've only run the first 4 dungeons as a healer once since release. Out of those i've had 1 good tank. Luckily my wife is an Arcanist and i had her get topaz carbie out or there was no way we would of made it. All 3 of the bad ones have been GLD and think they are just another dps class. If they used flash i was lucky.
Last night we did Halitali, carbie tanked the whole thing. The bad bad tank didn't even bother to try to pull the mobs off, I don't think he had to skills to do it, his skills not the game given ones. Now my wife isn't that great at MMO's, she is a horrible keyboard turner which I got her working on but when she tanks and does DPS and out performs 3/4 tanks we've come across it scares me on what the future will hold, not alone stresses her out and I dont want to shy her away from the game.
I also like when you get passed the cutscene at the start and at least one dps takes off and pulls before buffs are on and the tank and healer are ready.
I wonder how many tank classed individuals would sign up for DPS if it were a choice.