In the US there is a trend to not write orders down (the reason is unclear to me:it’s saves paper and makes it mor personal?), short term memorize them and run to the computer and type them in. This tends to lead to a fair number of mistakes, and makes those with allergies ver nervous.
You say it's a trend but most episodes of Kitchen Nightmares I've watched they've at least had bongs (written notes) handed to the kitchen staff and posted somewhere.
The real challenge would be a restaurant with dyslectic waiters.