Does it make applicants feel better to know that PDs have high levels of anxiety about all this as well? No?
Anyway. We match folks from all interview days. There is nothing about a particular day that downgrades your interview. Having said that, interviewing is exhausting for everyone and no different for PDs, etc. I have bad days where I just am predisposed to hate everyone. That's why there is more than one person doing the interviews. It's also why we discuss extensively. We are looking very hard for the best match. It just so happens that people who we identify early and come early often *are* a better match for us, but that is not because later applicants can't be good matches, it's just the bayesian distribution.
I've been fascinated by the number angle of recruitment since I started this and would happily tell you our match distribution after we're done this year. At which point, it will be too late.