First the Sox, then the Pats, now the…BSO? Beantown’s venerable symphony debuted its new musical director, New Yorker James Levine, at Carnegie Hall tonight—to a thunderous ovation. Our sources spied a gaggle of musicians departing rapidly after the gig, dressed head to toe in BoSox gear. Rumors also have it that, when schedules conflict, certain symphony players are charged with signaling game updates to their colleagues in Symphony Hall. Bravo.