Counter data point: currently sitting on DL653, DEN-LAX. Even though pilot announced some weather issues prior to take off, seat belt sign came off shortly after (little bit rocky but nothing major) climb out was completed. Service commenced on schedule but didn’t even get through C+ before we hit some serious chop!! That cart was bouncing all over the place!!

FAs took their seats for a few minutes but then bounced right back and are currently (cranes neck) around row 20, determined to finish. Go intrepid flight crew of DL653!!