I don't have any recent experience, but I did have scoliosis as a child and wore a back brace for several years.
If your daughter does have scoliosis, there are a range of treatments, depending on the severity: from observation for minor cases (to make sure they don't get worse), to a back brace for moderate cases, to surgery for the most severe cases.
The concern when children are diagnosed with scoliosis fairly young is that as they grow, the curvature will get worse. (If your daughter was done growing and had an 8 degree curve, it would be no big deal.)
If your daughter does end up with a back brace, it'll take some getting used to, but it's not the end of the world. They can be pretty well hidden with strategic clothing choices! I would also suggest finding a support group of other girls her age, or books that deal with young girls with scoliosis. (Deenie, by Judy Blume, was one of my favorites. I'm not sure if there are others.)
One final suggestion, be sure you and your daughter are comfortable with the orthopedist. If she does require treatment, she's going to be seeing this doctor several times a year for several years. (My doctor, Dr. Michael Shaefer at Northwestern was great...but he was old then!)
Good luck to you and your daughter.