I've seen plenty of people do large amounts of total damage, that means nothing - they could be lucky with AoE, hell as a Tank even I can hit 300k if people are idiots and stand in my AoE @ the doors in Voidstar.
You can't take that as an indication of the discussion here because we're talking about single target burst DPS - bare in mind too, your overall damage depends on how much combat time you have. Operatives being a stealth class typically spend less time in combat, but still pump out ridiculous damage considering this. What I mean is, the amount of damage you do through the entire warzone is far more variable and dependant on many other factors than just if your class is OP. Anyone can do a LOT of damage in a Warzone if they get things right and the enemy co-operates.
There's been times I've had 4-6 guys on me with my CDs up, and people have unloaded AoE on me, the enemy doesn't move out, they all die in a few seconds - this happens quite a lot, and as such, my Gunslinger friend can do some mad overall damage due to such ridiculous AoE.