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.
I'm always confused when they come over and just go straight into the "specials" speech. Don't you want to at least check if I already know what I want? Because I already know what I want.
PRO tip: Just try and get the general gist of each dish. Ask them to tell you more about the ones that sound most interesting. If they've memorized a full spiel for it, chances are they'd be happy to elaborate.
You can also say "I'm in the mood for something x" (light, savoury, filling, sweet; etc... Just describe what you're hankering for). Usually they'll be happy to suggest a good fit.
Your waiter wants you to have a good experience,, so take advantage of that!