It just makes it more of a conscious effort to pull the trigger. Between cops with little gun experience, and politicians that don't like guns in the first place...voila....the NY trigger.Oh I'm sure it does. I never doubted that. But I can't even think of a logical reason from that standpoint. Of course that's because there is no logic behind it, I know.
Those cops that came into the gun shop didn't know shit about their guns. Half couldn't even tell you what caliber they were shooting.
Here's a fine example:
http://www.cnn.com/2012/08/25/justice/new-york-empire-state-shooting/