If it means anything, I haven't had a single program say anything along the lines of "we will rank you highly" or even "you would be a good fit for our program". Instead, it has been "why should we take you?". And I have gone on 15 interviews (invited to 22). Maybe I just do awful in the interview, but I think anyone who gets these sort of comments should feel pretty good about it in a competitive field. That being said, I wouldn't put too much weight on them as has been stated before.