It's one thing if you're a stage actor. Getting the script out of your hand and internalizing it helps the performance. But commercial actors are accustomed to "performing" TelePrompter copy, putting all the necessary intention and meaning behind the words.
By having us memorize a bunch of stuff on less than 24 hours' notice, all we're going to demonstrate is a half-assed ability to memorize and a performance that's more about reaching for the next line in our head than giving a good performance.
And I'm not talking about a small handful of lines as part of a two-person scene full of natural cues. I'm talking about 200 words of narration.
I wish somebody would counsel clients on what's realistic and necessary for an audition.