Ouch Mark, completely disagree.
Adding so much of what comes in the score later, as most of the additions to the Prologue does, takes away from the careful build-up of the elements of the score. In the show, the Prologue establishes the musical language -- the tritones, lowered sevenths, major & minor tone clusters, and hemolias -- in the way they should be introduced. I know to say the music of the Prologue is simple seems absolutely ridiculous, but compared to the rest of the score...the elements are "simply" introduced and then built upon throughout the score. They become more easily heard and more dominant, complicated, and sound uglier in some of the later songs like Cool, Tonight, and A Boy Like That. It's a whole building block, and each song builds on the previous. But the movie Prologue puts lots more of the later elements in the first song, so the same build-up doesn't occur -- like the tritones so infamous in Cool are heard in the movie Prologue. It's more effective to hear the less obvious Tritones in the Prologue and then hear them completely built out in Cool.
And I hafta say I'm shocked to learn about the OBCR tempi. It took me 2 years to play The Rumble "up to tempo..." and now I learn I tried so hard to learn to play it faster than it needs to be played. Oh well.
"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