Does This Need A Spoiler Alert? Cause I'm Not Giving One

This is from Anthony Lane's New Yorker review of Tropic Thunder:

[...] the head of the studio hosts a video conference to whip the film back in line. He is a doughy, balding monster with big spectacles and even wider hand gestures, all his power distilled into profanity [....] It took me half the running time to realize who was playing this new beast, and it was only his voice that triggered the recognition; I suspect that there will be gasps during the end credits, as people see his name and find themselves rethinking the whole movie, marvelling at what could have inspired so stiff an actor to unfurl and bounce around.

You know, Anthony, I doubt hardly anyone's gonna gasp. In fact, I'll be shocked if any more than a handful of stragglers need even a minute (much less half the running time!) to recognize it's Tom Cruise. Sure, the makeup hides him, but his distinctive voice gives him away the second he opens his mouth.