Oh yes, there's definitely Doberman in her--she reminds me of my neighbor's Doberman/Shepherd mix Roxy. Different coloring and Roxy's ears perk, but they have similar fur texture and facial features. Ironic, given the fact that I adore Roxy and always said that I wanted a dog like her…guess I got one, haha!
She's got a blend of the GSD and Doberman personality too. When people refer to GSD puppies as "land sharks," they weren't kidding! I love my puppy, but wow. Total 180 compared to my Bichon when she was teething.