>>7309787 (lb)
It's not attention span. You can only give bullshit so much attention. If it's not concise, it will be channel changed. That's why ads have catchy jingles, are only roughly 30 seconds, and have so many after effects in them. The more people feel attacked while watching tv, the more you have to overwhelm them with information. If they're overwhelmed with information, their faith is restored in the system partly due to developed apathy.