I was going off this video: https://www.youtube.com/watch?v=7NA1wX1GgPM But I never noticed it was updated, so oops, You're right! Sorry for the misinformation.

Though I have to wonder about this Youtube comment:
It's because currently all DoTs in the game, all of them, are affected by SPELL speed. Instead of being Spell Speed for Mages and Skill Speed for Melee/Physical, as it should be. Just another bug that should get fixed eventually.
Regardless, no change in the tooltip is needed. I just wasn't sure if they were reverting the Skill Speed addition or not, but it seems to either be a bug that'll be fixed or just has insanely low scaling like always.