I would agree with Bobbyseal. It seems that the majoity of "successful matches" go to US grads, as it is a very very competitive match. Nothing is impossible, but the increased level of difficulty being a FMG applying into a surgical subspeciality is a strong reality.
As far as DOs, we have the "luxury" of applying to MD and DO programs, but also with the reality of not being "so competitive" in the allopathic realm. I matched into DO program, and consider myself quite "fortunate"