"Ooh an update about the Death Knight's starting level! We'll finally know after all these months!"
Well not exactly.
The starting level of the Death Knight hero class has been an uncertainty ever since Blizzard announced it was going to start at a pretty high level. It has been the subject of many speculations even up to now. All we knew was that it could be 55, or 60 or even 70! Well CM Bornakk gives us an update about the subject.
We haven't completely finalized a number, but we plan to have them start at a level lower than 70. We didn't have Draenei or Blood Elves start at a higher level when they first entered the game so we are aiming to make this Hero Class at a good level to learn abilities but also get to Northrend a little faster. source
So there you have it. They plan to start the Death Knight at a level below 70. So it's NOT going to start at 70. Yeah not much help, was it? We'll take what we can get I guess. We'll just have to wait.