Explanation seems pretty clear. A lot of Duck fans I hear talk act as if they have never had a down season, and their shit don't stink. The same little brother syndrome they mock of Oregon State, they had towards USC the last decade or so. One year on top, they've forgotten they ever acted in such a manner.
I also find it funny, not in this thread, but I believe in another on here, how for the past few years, it seems, NW fans have rooted for BSU, arguing their cause, etc. But when they could possibly get in the way of Oregon getting to the title, the same excuses the rest of the country made, soft schedule, etc. get thrown out here as well. Odd.