I saw a pretty funny clip from when it was the Pats/Rams SB. They showed a bar in LA and a bar in Boston reacting to their teams making it. The Boston bar was insane - people jumping all over each other, beer flying. In the LA bar, there were like 6-7 people at the bar, and one guy looked up at the TV and said something like, 'hey, I think we just made the Super Bowl.' And the people he was with gave some half-hearted "cool" reactions, and they toasted their drinks pretty calmly.
I'm sure it wasn't like that all over LA, but I don't think they're much of a football town.