Originally Posted by
Kael
This is primarily a choice performance bias. Almost no one plays sub regularly, excepting die-hard sub fans (from PvP players to high-end heroic), so your only option for parses are people playing it more poorly on average than other specs (especially on normal) and with fewer parses overall. If you look at the top end of a fight worth comparing -- 25H Juggernaut, for example -- the #s make a bit more sense. Assassination tops out at ~476k, where Sub goes up to 508k. Admittedly, that's harder to achieve on sub; the skill floor and cap are higher than for assassination (even in PvE). For anyone dedicated, however, Sub should come in close to combat single target (depending on gear, kill time), and above assassination.