I'm going to go in a different direction with this, Djphinfan...I don't think it has much to do with the Clink at all. Our 2008 and 2009 seasons proved that the energy of our home stadium was powerless to help an old, weak, poorly coached team. The Seahawks weren't talented, weren't gelling, weren't winning, and most importantly had no discernible direction. We were getting routinely beat at home, all the time, by quarterbacks who have since turned out to be terrible.
It was just an awful situation, and it came down to talent and coaching. The stadium didn't help at all. A few years of it, and I'm sure our attendance would be dropping like yours is.
The attitude you see on this current Seahawks team, I'd ascribe it more to these things than the Clink:
1. A lot of the intensity that this team has projects from Pete Carroll himself. He's the youngest 60-year-old I've ever seen, leads by example, practices what he preaches, constantly pumped up. For all the rah-rah grief that he gets, I'll bet the players love to score just to see him celebrate on the sidelines.
2. There's accountability in this organization that keeps everyone on their toes. Pete Carroll and GM John Schneider are constantly shuffling the roster and implicitly threatening jobs by doing so. This is a stone-cold front office that has no problem putting people out to pasture. We've had expensive free agents cut (and their cap hits swallowed), first-round picks displaced in favor of off-the-street guys, zero consideration given for cost, seniority, or incumbency. This creates maximum effort and week-to-week awareness from the players.
3. Many of this team's draftees have chips on their shoulders. Our current secondary mostly went under-drafted (vastly so in the case of Richard Sherman), our QB gets dismissed by everyone for being too short, our running back and fullback got tossed aside by their old teams, and in the end you've got a ton of guys who feel that they have something to prove to the league. They play hard to prove it.
4. We've won. I hate to say it, but the best way to get a roster AND a fan base interested is to start winning. Pete Carroll came in and immediately won some games that nobody expected them to win - the San Diego and Chicago games in 2010, the Saints playoff win of course, beating the Giants on the road in 2011 (before they won the Super Bowl), and this year squeaking out wins over some high-flying passing offenses. It got the team believing in itself and its ability to beat the odds.