Hashbrowns
Legend
What I get for my non crit Dplague against twink, is a Dplague adding around 1,414 plus or minus 1 damage of for error.
Thats 14.85% damage lost to the wind.
It's possible Wowhead's tooltips were data mined from old formulas. I'm sure Blizzard tweaks stuff all the time and I'm not sure how often Wowhead updates their stuff...