I have a Dornfelder from last Fall aging, actually might bottle 3 gallons of it tonight (have a 5 and 3 gallon carboy and oaked each a bit differently as a learning tool). I made it dry (I know most German versions are off dry to semi-sweet) and it definitely has a good body/mouthfeel and a color that would make a great red dye (extremely dark). I think it can take quite a bit of oak, that's why I'm experimenting with it.
I got the grapes initially from a vineyard just South of me in Southern PA (we are zone 6b here, rarely go below -5*F in the Winter, and if we do it might be for a day or two tops). They tend to ripen with a low brix, the vineyard operator says 18-20 brix is normal. I boosted the SG with a simple syrup, but you can't tell it is watered down at all since it is such a strong, heavy grape. Also he harvested them about mid-September, so I think they are an mid season red around here.
I'd be willing to send you a 375ml bottle from what I bottle tonight if you'd like to sample it, just PM me your information, I'll send it once I get paid on Wednesday (assuming I bottle it tonight, I'm losing interest at this point, surfing and beer are dominating my evening).