Flew today from JFK to LAX in F, having reserved my meal a few days ago. Before takeoff, the FA in charge of F stopped by my seat to confirm that I had reserved a meal in advance. She said I'm the first passenger she has encountered who has done so, and she thought that today might be the first day of reserved meals. Anyway, she asked what I thought about it, I gave positive feedback, and my reserved plat principal was served as promised ^