Here's the world premiere score card for orchestras I'm tracking:
New York Philharmonic (Gilbert): 7
Los Angeles Philharmonic (Dudamel): 9
San Francisco Symphony (Thomas): 1.5 (the .5 was expected this season, will be performed next)
Atlanta Symphony (Spano): 5
Chicago Symphony (Muti): 4 (but you really have to dig through the press release to figure this out)
Cleveland Orchestra (Walser-Most): Has not announced 2010-11 season yet
Boston Symphony Orchestra (Levine): Has not announced 2010-11 season, excepting their Carnegie Hall appearances, which will include a new violin concerto by Harrison Birtwistle, which Christian Tetzlaff will perform.