Back to the topic (though I'm definitely gonna see if I can still get some Fluff and introduce my kids to a Fluffernutter--not that I'm doing them any favors nutritionally by doing so)...
If the Bengals don't play to win, I don't see that they are so strong and seasoned a team that they'll be able to turn it off and on in less than seven days against a tough Jets D and Running Game. In other words, if they mail it in this Sunday, I believe that they significantly raise the risk of losing next Sunday as well. I think their coaches are smart enough to figure that out.
This Pats team will play to win as well. The 2003 or 2004 teams wouldn't have had to. This team has been inconsistent all season (three wins followed by a thud in Denver and then losing three out of four including two in a row for the first time in forever) but has now played three consecutive good halves of football after winning ugly against the Panthers. They haven't beaten a team with a winning record on the road all season. I think the starters will stay in as long as it takes to beat a strong team with Playoff aspirations on the road.