I can't imagine that Columbia isn't shuffling through terrific applicants for PD -- and won't select someone highly qualified for the position -- but does the situation deter you from ranking their program highly or number 1? Are you concerned that you might not click with the chosen individual? Just curious...
Well, when I think of the role of a PD from a prospective resident's perspective, I think things break down into two broad categories: things that affect me on a personal basis, and things that affect me and my fellow residents as a group.
On an individual level, I think that it's quite important to feel comfortable with the PD. If personal issues arise, it's vital that the PD feel like an ally. It would be terrible to be going through some tough personal times but not feel comfortable talking to one's PD about it and feeling supported. Also, the PD is in charge of my educational experience, and I need to trust them to honestly and constructively give me feedback on my performance.
On a group level, the PD is the residents' advocate within the department. He/she must be effective in lobbying the interests of the residents to the higher-ups. Also, the PD plays a key role in helping residents secure the post-residency positions they aspire to.
None of these points has to do with the PD's "qualifications" per se. I'm sure everyone Columbia is interviewing is qualified -- indeed, I haven't really met a PD I would knock for being "unqualified."
I do think that the "individual" role of a PD does have to do with how you "click" with them, at least to some degree. So, there is no way to know how things will pan out for anyone on that level vis-a-vis Columbia.
The former Columbia PD had been there for decades, however, and it seems that he was clearly someone who would've been attractive with respect to my "group" concerns. Having been in an institution that long, and having trained many faculty within the department, certainly makes a PD a valuable advocate for residents. And long experience in the job probably helps a PD with getting residents where they want to go after residency. These factors, I think, will be hard to replace.
How much should who the PD of a program is affect how someone ranks that program? I don't have the answer to that -- I'm working on it!