Something is seriously wrong with you guys' phone. I have done this on three different Moguls, and will do this on my new Mogul that is on its way. I even turned it down to 0, and it rings instantly, but the battery life goes to poop. So I leave it at 1 and takes about 2.5 seconds before it rings, when its set to the default 2, it takes 4.5 seconds before it rings.
Are you saving the changes?
Also, the program to aquire your MSL is GetSPC. You should be able to Google it, and it will probably link to some thread on here.