If a waiter thinks their guest can digest such a blurt of information, they don’t know how humans work. This isn’t ADHD, this is being in a new environment with lots of stuff already there to process. And then you want me to listen to your TED talk about your diner? Just gimme the fucking menu, I can read!
A lot of places here write the non-permanent specials on a blackboard, and the waiter puts that blackboard next to the customer's table and gives them some time to digest it after he's done his little talk.