Well, I thought we were pretty loud Monday night. I yelled from the time the players took the field, til the end of the game, and my voice still hasn't returned to normal.
I think a lot of fans in Dallas, not just Texas Stadium are a bit reserved (I notice this at Dallas Stars games also), but when riled, can get pretty loud. Numerous times, when we were on D I would stand up, and start yelling, and turn around trying to get others to do the same. It worked for the most part. You always have a few corpses here and there, but it was a fun night.