Folks, especially everyone who has tickets after this date and is freaking out, I would suggest calming down and taking it easy. I have tickets for the 24th, third time, though I'm bringing my mom and aunt, and I'm not gonna start freaking out until I hear something official and concrete--not a confirm from the original poster, but broadway.com, etc.
I'm pretty sure this isn't true, but I could be wrong, just a hunch, goes against things I've heard, that's why I suggest waiting for official notice.
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli