I believe the discussion had drifted to LEO duty carry, in which bulk and/or concealability doesn't matter, but weight, length, and shootability does.
The G34/35 was designed to pass the "box test" so not surprisingly is roughly the same as a 5" 1911. Holding the two tells a different story, but on a duty belt you're basically back to the "box test" standards.
If it doesn't excessively weigh down an already heavy belt, and doesn't bury the muzzle into patrol car seats (and push up into your torso) then shootability and control "at speed" and under stress should become the focus of evaluating the best pistol.
Just a guess, but the lack of widespread adoption of longer slides probably has something to do with "uniformity" within departments, with the detectives, management, and little people preferring the G19 or G17 sized pistols. Also, most cops aren't "gun people" so they probably haven't even considered the benefits of a longer sight radius. Just guessin'.......
