Let's just take this one by one.
Washington St (7-2) - Their only road win is Alaska-Anchorage. They scheduled way down, so their two losses (@Gonzaga and @Kansas St) are reasonable, but none of their wins have any true value. Winning the Pac-10 would leave them with a gaudy record and a probable bid, but would you trust that happening?
Washington (6-2) - No quality wins here either. Both losses are reasonable though (@TTU, N-Georgetown). They at least have Portland and Texas A&M coming up at home to try to give some credibility to them.
Arizona St (7-3) - They lost their 3 toughest games. @Duke and @BYU are reasonable losses. Home to Baylor? Mehhh. At least they beat LSU on a neutral. One chance against SDSU coming up.
California (6-3) - Again, loses all their big games (N-Syracuse, Ohio St, @New Mexico). At least they decided to play a true road game at Pacific and won that. By the way, 4 teams into this, a road win at Pacific is the best win for the league. They have a true road game at Kansas soon, so we'll see.
Stanford (4-3) - Ok, they beat Virginia at a netural. And took Kentucky to overtime. Then again, lost to Oral Bob and to San Diego on the road. But they have the signature win of the conference so far.
Oregon (4-4) - Lost to Montana at home. Colorado St is their signature win. Next. At least 2 of their losses (@Missouri and St Mary's) are explainable.
Oregon St (4-4) - Did beat Colorado, and a true road win at George Washington. Then again, lost to TAMU-CC and Sacramento St
Arizona (4-5) - At least they're scheduling up. All 5 losses aren't bad (N-Wisconsin, @SDSU, N-Vanderbilt, UNLV, @Oklahoma). That leaves Colorado as the signature win. Oy vey
UCLA (2-6) - Not going to bother with this one. At least credit them for scheduling up, though.
The league's best win is a neutral site win over LSU, a neutral site win over Virginia, and maybe the Pacific win on the road. Going through all 10 schedules, there are approximately 30 games in which if the Pac-10 team won the game, that game would qualify as the conference's signature win. I've never seen a scenario where the top 30 games of a conference's non-conference schedule were all losses, every single last one of them. This is truly historic.
This is no better than the #11 conference right now. Put the A-10 WAAAAAAY above them. MWC above them. MVC above them. Probably the WCC too. Hech, throw CUSA in there.