Five lessons from Sunday's conference championships:
Home-field advantage may be overrated.
The Ravens' Joe Flacco watches another elite quarterback disappear in his rearview mirror.
Linebacker Ahmad Brooks didn't make one tackle for the 49ers, but the second of his two pass deflections was huge.
A team that takes a 17-point lead over the 49ers may want to stretch it to at least 30.
It's a tossup whether Sergio Romo or the 49ers' second-half defense is the best stopper in San Francisco.