Elite 11 and all of the various QB eval camps can be overdone as they correlate poorly to the actual skills needed in a real college game, but it does allow you to see a few things.
The brief video of Texas Longhorn 2020 commitment Hudson Card shows one attribute that translates as well in shorts as it does in pads with a DL closing in on your legs: zip and velocity. You see it repeatedly on the tape. When he needs to get a ball in somewhere quickly, it pops off of his hand. It’s not surprising that Card also tested out highest among all of the campers on the radar gun.