For ortho, Columbia has a much higher percentage of their students going into it than Maryland ... last year 8 out of 78 Columbia grads went into it. For peds it's about the same between those two schools.
Then again, students with stronger academic background tend to go to Columbia (as measured by DAT), and hence being in top 10% at Columbia may be as hard as being in top 3% at other schools.
Columbia does have overall higher percentage of grads going into specialties (excluding GPR/AEGD) than other schools, the exception being Harvard.