I would definitely recommend physical therapy post op. I was in therapy for about two and a half months going 3 times week. I did not have my therapy at John's Hopkins but rather at an outpatient facility close to home. I was given a exercise protocol by Dr. Lum that my therapist followed. The beginning of therapy was centered around eliminating the soreness and increasing range of motion. As the soreness subsided it focused more on strengthening exercises and posture training.
I am not sure what percentage Dr. Lum quoted me for post op scar tissue formation, but a key part of the physical therapy was aimed at reducing the incidence of scar tissue formation with soft tissue massage and stretching exercises. Again let me know if there are any other questions I can help with.