For the two jobs I've had, the interviews lasted all day and a few people were considered for the position. In both instances, others had interviewed on days previous to me, but the offer was made to me.
It's not clear whether they just stopped interviewing when they found what they wanted or if I just happened to be last both times.
In my opinion, the cream will rise to the top regardless of the order. If you're all about the same, then it might matter...