It took me some 15 years of intensive railroad usage to learn that after the announcement "Train leaves from gate 2", there is exactly 3 minutes time. Today, after 18 years, I learned that there is a yellow color coding in the timetable posters for leaving trains in opposite to arriving.
These information bits are examples of tacit knowledge, which would be useful if know, but is either difficult or considered less important to communicate. In modern world, consumers do not necessarily have time or will to start learning. -Experience should be readily available in full extent.
One task for service design is to find ways to communicate these service and company specific information bits, celebrate those and build a better brand and user experience through those.
-After all, you would like the customer to see your product as excellent as you see it, wouldn't you?