As for switching from family med to ortho in 4th year...hmmm, thats a head scratcher. Yeah, I do have a little bit of a problem with that. First, this is 3-5 years of your life, to flip flop so easily shows that during the first 3 years you took very little interest in this, and its not a decision that should taken half heartidly. Seriously, I've seen this many a times where people flip flop, end up in that specialty, then match out of it again after internship year. This is five years of your life, it should be taken seriously, and I don't think rash decisions should be made over a one month elective in a certain specialty.
Secondly, look at the difference in lifestyles between the two. If you were interested in surgery, why not G-surg, or ENT, or Neuro, or anything like that, why family med? You do know that the only residencies really having problems comforming to the 80 hour work week are the surgical ones. From my experience most people interested in family med hated their surgery rotation, hated the lifestyle, and hated the attitude...for me I was a surgery junky, I loved being in the OR REGUARDLESS of what it was....and you get a chance to experience this in 3rd year.
Thirdly, we're talking about 4th year here...if you are unsure at that point which specialty you want, maybe you should think about preliming. The other poster mentioned she made her decision during 3rd year, which is where you get your surgical experience, where you get to explore your personality and what fits you well in medicine. If your interested in ortho, EXPLORE IT THEN, why wait later(especially 4th year, which is last minute)??? Go to the lectures, grand rounds, spend your free time in ortho clinic/OR, research ortho...this is the looking into things during the first 3 years I talked about. Yes, I know some private docs in surgical specialties who decided late, however, this was in an era before the match, and they had a chance to explore surgery in there internship before committing to a specialty. Its a much different boat. Nothing is wrong with a prelim year, if your unsure, just do it, in the grand scheme of things 1 year is a small small portion of your professional career
I can say one thing that sums it up. There was a student I rotated with who was b/t Plastics and ortho, 2 at least surgically related specialties...you know what one of the residents said to him "Oh, so you aren't really seriousl about ortho then?" It doesn't matter what I think, it doesn't matter what you thin, it matters what the powers that be think, and that kind of sums up alot of the attitudes I've encountered. If you want it, you better be dead serious about it, not some passing fancy in your 4th year to PC....