The 11 minutes number assumes that you don't consider the formation (and constantly changing formations) before the actual play is run to be interesting.
Although the Super Bowl isn't known for attracting "true" fans, I would hope that "true" football fans would appreciate the intricacies that take place before and after the plays are run.
Edit: And honestly you think 1,400 people are going to be trying to sniff the WiFi from within the Super Dome?
Bur seriously, with only 11 minutes of action in a 3-hour event, 2% may be realistic.