Only if you run it in the same order everytime.
What's weird is that if you read Roth and Peranson's original algorithm article (
http://www.bepress.com/cgi/viewcontent.cgi?article=1016&context=wilson), it states small variations in the matches if programs and applicants are processed in a different order. Meaning that I could have potentially go to a different program if they processed it in a different order (although quite low...I think they said somewhere around 2-3 program differences in filling).
I would hope they would run the program in every conceivable order to optimize number of matches (computation should still only take a day or so) so that the least # of slot go unfilled; but I expect they run it in the same order every year to have "consistency".
I actually don't care as long as I match, just thought order entry effecting the match was interesting.