That's tough. I will admit, I was in the 4th grade when I started shaving. My mother forbid it until the age of 18, but I did it behind her back. I am hispanic and my hairs tend to grow thick and dark. I found it embarrasing. I cared about how others saw me. It was important for me to look good. I didn't think I looked good because everyone else was shaving their legs. And, there I was, a little hairy monster. These days I could care less. I know I have a stronger self-image.
Society has changed. These days kids have a lot more to deal with. There are a lot of artists, and actors setting trends and ideals for young kids today. I think it's important that you teach your daughter your values, develop, and strengthen their self-images.
I wish I hadn't started shaving so young. I have to shave almost 2x a day now. I think it could definitely wait, but your daughter should feel good about herself either way. If not, then try to connect with her. You could always make it a bonding experience. You would be the one to teach her to shave. And, it could be her rite of passage. Just make sure to teach her to sterilize the shaver with alcohol to prevent razor bumps. ;)