I'm spouting this from memory, and in a vacuum the numbers probably don't mean much.
The league average time to release was right at 2.75 seconds. Darnold's was 2.85 seconds. Teddy was right about 2.6, I think, and if I remember right he was fourth or so. I remember his time was in line with but a little faster than Brees.
I say the numbers don't mean much in a vacuum because a QB with a strong, clean pocket for 2.75 seconds is a lot different than a guy running for his life to get it off in 2.85 seconds.
For comparison, Mayfield's was the longest at around 3.2. If my memory is correct, Mahomes was a shade under 3.
Haskins was the fastest, I think. Of course, you don't need much time to make a lousy decision.