Disagree. We played like crap the whole entire game. Straight from the opening kickoff where we fumbled. You have to realize, Seattle did not get hot until December with an OT win against the Bears. Started a 5 game winning streak and 7 of 8 total.
For the first part of that season, they piddled around .500. Going into December, they were just 6-5. Losing to teams like the Cardinals, Rams, Lions and Dolphins. No one thought anything of them.
We played Baltimore on the road much better. So we were capable of much more in that Seattle game. But to the OP's point, that's just who we are. Wildly inconsistent. We played great against the Giants and crappy the very next week.