At lunch today, 15 minutes after we ordered entrees, our server said they'd be out in a few minutes. After another 15 minutes, she said they'd be a few more minutes because she had forgotten to submit our order to the kitchen
Our server provided all this info on her own initiative; we never asked. She was polite, and she apologized in passing for the delay, but this was a substantial delay, relative to the times I've dined in the past. (The restaurant is attached to a full-service boutique hotel.)
We did not complain in any way about the delay, or about anything, for that matter. I decided that if we received any compensation, such as dessert, I'd tip a normal amount, but that if we received nothing, I would tip nothing.
We didn't ask for or receive any compensation. My dining companion insisted I tip something because the server wasn't rude, and I agreed, so I gave 12.5%.
What would you have done?