I don't need braces for more than a month, and my surgeon (private practice, US.) needs about 2-3 week of notice for prep work, so while I don't have a solid date, it will be sometime early-mid summer.
With regards to coffee's statements about relapse:
The important thing to realize is that mandibular relapse is not a highly predictable phenomena. At best, clinicians will state that there are certain potential contraindications for the surgery: physical properties that may increase their chances of instability and relapse. In Coffee's case, her open bite is entirely congenital, her maxillomandibular complex is prominent, and her mandibular angle fairly low. These factors would lead a surgeon to believe that lower jaw work can be done with extremely low chances of significant relapse.
In your case, Lea, your surgeon will likely attempt to minimize any potential risk while maximizing the functional and aesthetic outcome. It is difficult to accept that compromises must be made for surgical, functional or even financial reasons , but you should remember that the surgeon in question almost definitely considering the entire situation with a much better grasp of orthognathic principles than you or I. That is not, of course, to say that "the doctor always knows best", but it is important to remember when considering any emotional responses we may have to new appointments and information.
-sharptoys