This is a 'scorecard' by conference for 2013, the 15-th for the 64-team playoff system where every well-established conference gets an automatic bid. You can find the full results elsewhere.
My original motivation for this summary was the thought that the regionals are a major source of inter-conference and inter-region play that helps one evaluate the relative strength and (possibly) future seedings of teams from various regions and conferences.
Current status:
Super Regionals complete.
LSU (SEC, N4 seed) and UCLA (Pac-12, beat N5 seed) are first into CWS.
Here is the 'histogram' of the success rate for the 2011 NCAA regionals.
I tally a Regional champion under "win" and the Super-Regional champion (the team that goes to the CWS) under "champ" so the "champ" column is unchanged from the older 48-team system.
------ wins ------
Conference Number 0 1 2+ win champ comments
========== ====== === === === === ===== -----------------
SEC 9 1 2 2 2 2 5 losses on 4-5 first day
ACC 8 2 2 2 2 only a 5-3 start
Pac-12 4 2 2 strong, with perfect 4-0 start
SunBelt 4 1 3 2-2 start but FAU beat N1 UNC
Big-12 3 1 2 solid, deserved more?
Big West 3 2 1 perfect 3-0 start
Colonial 3 2 1 over rated?
Big East 2 1 1 perfect first day; UL beats N2 Vanderbilt
Big Ten 2 1 1 perfect start; IU beats N7 Florida State
Southland 2 1 1 Central Ark gets best-4-seed prize
West Coast AC 2 1 1 bad 0-2 start
Big South 2 1 1 Liberty knocked out Clemson
Mountain West 2 2 bad 0-2 start, bad finish
Atlantic Sun 2 2 bad 0-2 start, bad finish
Conf USA 1 1 Rice upset N8 seed Oregon twice
Ohio Valley 1 1 Austin-Peay beat Florida
Southern 1 1 .
Northeast 1 1 upset Arkansas
Horizon 1 1 upset Florida
Ivy 1 1 Columbia gets 1st tourney win
America East 1 1 .
MAC 1 1 .
Mo-Valley 1 1 Wichita St is back, and gone
WAC 1 1 .
Summit 1 1 .
Atlantic-10 1 1 .
Patriot 1 1 .
Metro Atlantic 1 1 Last regional win was in 2006
SWAC 1 1 Last got a tourney win in 2004
MEAC 1 1 ONLY regional win was in 2002
Great West 0 - NO AUTOMATIC BID (new in 2010)
independent 0 - only New Orleans this year