The problem here is that it isn't though. First of all it should never ever happen. since if your dps is so bad that it can't outdps a tank you shouldn't be able to ever down a boss. Secondly, this is taking into account everyone that uses world of logs wich includes some of the best players in the world, and tanks are still dominating fights without gimmicks. As dps you shouldn't be chasing the tank, it diminishes your contribution to the kill. If you are there to dmg the crap out of something so it dies before your tanks does, then those tools should be given to you. On our first doggie kill, I did around 88k dps wich at the time would earn me a spot in world of logs as one of the best 25 man dps numbers recorded. I am by no means the best player, nor do I think I will ever be seen on that chart again, but that is well above average, I dubbled the dps of some of our other dpsers, yet the tank cruised in at 90k dps without breaking a sweat, he focused on surviving, not even going all out dmg and he still easily went to the top spot. only 2 of our dmg dealers managed to go even with him.
the numbers tanks are pulling are ridiculous they need to be toned down (yes down, not bringing dps classes up) and do not even try to bring up threat, like some people in this thread tried to because you can cut the tanks dps by 99% and still have the deal the same threat if you wanted to.