I'll be completely honest with you in saying that I don't know all of the particular ins-and-outs of the procedure Arnett has planned for me like so many of you on this board do. I'm extremely impressed with the knowledge all of you have not only about your own procedures, but also about the procedures that others are having as well. From this point forward I will certainly be doing my own research and paying more attention to the exact details of my case in my various consults, so hopefully I will have more specific answers for all of you in the future.
I did my initial consultation with Arnett several years ago which my parents more or less dragged me to, so I wasn't entirely focused on the considerable amount of information he was offering me. At that point I was in somewhat of a denial of my jaw problems, and I think part of me hoped that by ignoring them I simply wouldn't have to have the surgery.
To the best of my recollection my lower jaw will be moved to the left and back while my front jaw will be moved forward so that all of my teeth align to fix my open bite. I currently have an asymmetrical face that is particularly prevalent in pictures where I am smiling, so having a more aesthetic smile is a primary motivation for me especially considering I am pursuing a career where appearance/first impressions is of paramount importance.
As for the short time in braces, I think this is due to the vast majority of my problems being jaw related and less to do with teeth positioning/straightening. My orthodontist predicts that he can have me ready for surgery in six months and that all in all the process can be done well under two years from braces on to braces off (although he did quote 2 years being the maximum time depending on any setbacks that may be encountered). Of course I need to have all four wisdom teeth removed and Arnett can be difficult to book, so all of that may skew the timetable closer to the two year mark, but I plan to do everything in my power to minimize the timetable for this and get it over and done with asap.
Also, Znewton if you're reading this, best of luck in your surgery. You're in the best of hands so your results should be stellar, good luck!