Week 2 brought us clarification that USC is top dog in the Pac-12

Although Week 2 of the college football season is essentially irrelevant considering many teams are still in the cupcake portion of its schedule, the Pac-12 was tested last week. Sort of. 

While every other team played nonconference opponents, USC beat Stanford 42-24 at home and is now atop the Pac-12 standings. You can forget that Western Michigan even tested the Trojans, because USC passes the eye test as a team that could represent the Pac-12 in the College Football Playoff. 

Washington State won a shootout against Boise State in triple-overtime, while Oregon nearly blew a 21-7 lead to Nebraska but still beat a reputable program. 

Washington routed Montana and Colorado thumped Texas State, which means … what exactly?

Here's what we know: Oregon is taking leaps in Willie Taggart's first season at the helm, while USC's title hopes have gone up another notch.   

Here's a look at this week's Pac-12 power rankings, as voted on by Michael Lev, Zack Rosenblatt and the Arizona Daily Star rookie Justin Spears.