When im tanking I prefer DPS to be pulling, as long as there isnt a mage bodypulling and getting killed. But as long as our healer and tank (me) is capable to handle the adds / packs, i prefer them to pull, as they can often keep the flow of moobs alot faster than if i were the only one to pull.
With the new 500% threat keeping aggro or getting it isn't even an issue anymore.