I have a 26. Pinky finger hangs loose. Grip extensions can sometimes cause "pinky pinch." Not pleasant. Takes time to get used to holding for proper hits. But I dealt love it....
Post 23 is spot on.
Is this phenomenon an aspect of the Glock or the retention holsters many cops use? I have heard that using the trigger finger to push the release on the holster as you draw has a tendency to put the finger inside the trigger guard as the gun leaves the holster. Having used a type 2 retention holster (Blackhawk) I can see how this would be the case.