Funnily enough I was thinking the same thing only last night.
It was pretty damn loud where we were in the 300s. Not much quieter (as I remember it) than the home game against SF (also watched that from the 300s).
A row of Donkeys fans in front of us were not happy about it. The one in front of me swapped places with his buddy at the far end after one quarter, as if that would make a difference.
It hadn't helped that, prior to kickoff, the stadium presenters on the big screen had been asking the crowd who made the most noise. When asked, the Donkeys fans sat in their seats and whooped and hollered. When the Seahawks fans were asked, every 12 there stood up and roared their heads off.
I couldn't say whether or not they could be louder than us normally. Let's face it, they didn't have much to cheer about from 12 seconds in.