Yes, he did. Since Damon was on his tummy, I think she had a hard time hitting the targets she wanted to hit. It's much easier to hit something vital if the person is on their back because you can see the chest and know where to aim. Also, Devon was shirtless and Damon had a black t-shirt on. Its hard to kill humans. We don't want to die and we have a very strong instinct to fight and survive. I think to kill somebody quickly with a knife, you've got to stab the right spot( like the throat). That's why in a knife attack, there are usually alot of defensive wounds. Damon hung on like a little trooper, but he was no match for his mother.