Here's my cut-and-paste post regarding schedule strength:
No, they didn't. You can't look back in retrospect and use winning percentage because the outcomes are dependent events. We play 6 games against 3 division teams that also play common teams from 2 other divisions. Weaker common opponents inflate wins within our division and stronger common opponents have the opposite effect. Those statistics are almost completely pointless by the end of the year. Actually, they're not even very useful at the start of the year because every team basically plays only 3 divisions each year (i.e. the Jets are not as good as their record, they just took advantage of their schedule and went 6-2 against those two soft divisions). If you want an accurate estimation, take each opponent individually and rank them against the entire NFL pool.
Last year we were handed a cupcake schedule. We played the two worst divisions in football, and that's not really even debatable. Those 2 divisions did not produce a single legitimate playoff contender -- every single team was a complete pretender, and we couldn't separate ourselves from that mess. Even worse, a large portion of those teams are comparatively soft and don't play a physical brand of football (IND, PHI, JAC, TEN, DAL). Contrast that to this year where we are playing the two most physical divisions in the game right now (by far), including teams that are expected to go deep in the playoffs.