I'll be honest, I didn't measure the difference before the TLG LEM setup, then 4.1, then GGI so it's difficult to talk in specifics. With all 3 combined, the reset is the shortest it has ever been, so I definitely like that.
I did the DA/SA thing years ago with SIGs, some HKs, etc. So it's nothing new for me. That said, I've been shooting Glocks significantly over the past 10yrs. Getting used to the longer reset in an LEM or DA/SA SIG has always been an issue for me. This combined setup has made it pretty much a non-issue at this point.