More often than not, I do resist. Obviously some posters handle brutal honesty better than others. Better get used to it if you ever plan on being a resident.
Elizabeth, as I have posted elsewhere, endocrin is considered to be a non-competitive fellowship. The procedural (interventional cardiology, gastro) IM specialties are generally competitve. The cerebral (ID, endocrin) IM specialties are easily attainable, relatively speaking.
IM residents apply during their PG-2 for a position that starts after their PG-3. IM boards are at the end of the PG-3, so ABIM scores are not a factor in selection. Note also that most procedural medicine specialties are oversubscribed, particularly gastro and interventional cardio.
Generally speaking, the competitiveness of an IM specialty is based on Sutton's law.
Ortho surgery is much more difficult to get into than IM, if comparing residencies at the same facility.
The #s support my earlier post about the relative competitiveness of neurosurgery, uro, ENT. Some years, derm is the toughest specialty to enter. Note that these statements are consistent with Iserson's views. Neurosurg is no higher than the second tier of competiveness.