At this current point in time with the most current beta build using a program called the hex tool
This tool used level 80 values for hit and crit but level 70 gear and level 80 talents
This means that your hit will be lower then it will be at 80 becuase the values are lessend.
Using warrior T6 gear as the equivelant becuase essentially it will be the same as our DPS gear, current 2H DPS using the build http://www.mmo-champion.com/talent/?...00000000000000
and the rotation, IT, PS, Degen, Oblit Deathcoil until out of runic power does 2590 DPS on a morogrim style boss with 80 values, it takes into consideration glancing and armor etc.
Using warrior T6 dual wiedling gear with 2 slow weapons, and the build http://www.mmo-champion.com/talent/?...00000000000000 using the rotation IT, PS, Degen, BS, IT, deathcoil until out of runic power does 2500 DPS on a morogrim style boss with 80 values taking into considertion armor glancing etc.
The one thing Hex lacks is the current runeforging buffs, wich the 2 stacking fallen crusaders will probably more then make up for the 100 DPS loss from DW'ing AS IT STANDS NOW DW'ing vs. 2H is a simple matter of choice, with 80 gear it may well pass it becuase we will have proper hit rating becuase we are not using 80 values with 70 gear.
I REITERATE DW VS. 2H IS A MATTER OF PREFERENCE
The reason DW can match with 2H for the most part is becuase of blood rune mastery, you have more blood runes, so essentially when somone else could use 2 blood strikes, you can use 4 while keeping the diseases on thus keeping them ticking for what they do. The tests are run in unholy and blood presence, the DPS was pretty much the same.
I prefer DW'ing and thats what I will do, 2H does outperform for once but not by enough to make me want to do so, I just don't like the slow pace of 2H and that is simply my choice but I hope this clears it up and kills the 2H vs. DW crap threads, the Hex tool well google it, not hard to find a very good tool for deathknights atm.
If somone could post this on the beta DK forums for me and give Stormslap of Greymane credit that would be great, I'm just a little forum banned for . shock way back : /