As a senior resident who has been intimately involved with two years of the interview process, I would always be cautious about what you see at any interview. Every big program usually looks different on the interview day then it does on a regular day. I would recommend speaking with students who rotated at a program or even going back for a second visit at places that really wowed you at the interview day. I am not speaking specifically towards Duke, which is not my home program but is a place where I interviewed and is obviously a top-notch program. I am speaking more towards the interview process which ends up being a horse-and-pony show at most of the major programs. I remember being blown away by several programs on interview day only to speak with students who knew the program intimately or former residents who were not quite as impressed.
In terms of operative experience, it is always nice to be able to ask residents about their numbers and also speak with people who have done a fellowship at a place. Fellows are usually unbiased and will have a pretty good idea of how competent the residents are in the OR. Operative experience is always relative, particuarly as a junior resident. Many programs operate early, but it is important to realize what this really means. My program, which will remain nameless, is good about letting the residents operate at their level. As amazing as most students assume they will be in the OR, even the best of you will struggle and look pretty incompetent as junior residents. Second year will probably be the most humbling experience of your medical education to date. Instrumenting the spine or being left alone in a room to struggle through a complex fracture in July of your second year is probably not the greatest thing for you or your patient.
Having seen it now from both sides, I think that it is important to find a place where you will fit in and feel confident about the education you will get. Early operative experience is great, but it means nothing if you don't like the program faculty, don't like the city, etc...
Enjoy the process, as you will be working your butts off and eating cafeteria food soon.