I have some info from my 60 paladin, here are the details:
I have logs of her tanking in the graveyard in Chardok using 2handed weapons, one from 2 months ago and one just completed a few hours ago. On caster mobs I use
epic and on non-casters or undead I use
Great Spear of Dawn for a little extra dps.
From two months ago:
Combined 2hander dps: 44.9
Epic avg hit: 77
Epic max hit: 177
Spear average hit: 110
Spear max hit: 256
And from my session in graveyard today:
Combined 2hander dps: 59.2
Epic avg hit: 103
Epic max hit: 206
Spear average hit: 144
Spear max hit: 295
My equipment has not upgraded in any way since two months ago. I'm sure there's some randomness in the numbers, but I don't think randomness or slightly different buffs accounts for the full 33% boost I see here. I threw in the avg and max hit numbers because the dps increase wasn't just using the higher dps weapon more - both weapons hit harder on average, and both weapons hit for higher max hits. The boost is real, it's just a matter of teasing out what the real percentage is. The rogue in my group was pleasantly surprised, I'll say that.