The way I see it is this. From a strictly applicant standpoint the people the receive the first interviews start off with the highest chance of getting accepted. They invited you first because you were the best applicants they saw and wanted you to come for an interview. The interview is the difference maker though. Obviously someone from a later interview can be very personable and leave a great impression while one of the first interviewees did the exact opposite therefore raising the chances of the later interviewee and lowering the chances of the 1st interviewee.