This range report shooting the 5x5 classifier with a G19 and then a G44 is not about draw to first shot of course. However their observations reveal some clues.
Most importantly:
1. G44 trigger was somewhat lighter than the shooter's G19 trigger
2. Shooter's hits were somewhat worse shooting the G44.
The shooter observed he thought he could blaze and his trigger press and recoil anticipation dispersed his .22 hits a bit more.
Light pistols can be tricky. If one got to a high level of performance in a draw to first shot to a low probability target - I bet their fundamentals will translate well to their Glock standard frame centerfire shooting.
A watch out would be don't cheat the grip due to light recoil and maybe lighter trigger. I've been vulnerable to that training dry fire and it bites ya in the ass in live fire.