I've had some excellent times shopping, too. I have hit the same cashier at a local drive through two times this month and she did excellent both times. She was scripting, promoting the new item, upselling, and upsizing, and the food was out fast. She was smiley the entire time and she was doing it with every car. She was definitely aware of what she was supposed to be doing. I read her tag and I believe it said she was an assistant manager, so perhaps that's how she go there
Odd that the assistant manager is in the drive through on the headset, but also maybe they know when shops dates are coming so they want the best in their windows.