If a team believes they are outmatched or that an opponent cannot be stopped in Foxboro or anywhere else, that can adversely affect the outcome for that team. I seriously doubt that any professional team with a 7-0 record, regardless of prior historical outcomes, would perceive itself outmatched by anybody, anywhere. Also, even though there are some players who probably played on all of those teams, I'd guess at least half of the starters don't go back all that far.