From my own personal experience in actually shooting a good number of rounds through my girlfriends LCR in 38 Special, I'd have to say it has the smoothest DA trigger pull I've ever experience from a stock revolver. It rivals the trigger pull on some of my revolvers that have been worked over. I don't know if all LCR's have such a nice trigger, but her's is butter-smooth.
I own 2 LCRs...a .38 and a .357. Both have the same smooth trigger action, right out of the box. I would think that most every one out of the box is basically..."Butter-Smooth!"
My s&w m60 was the best stock trigger I've ever had.
I personally have ranked the Ruger LCR as the very best #1 trigger press, but I will agree with you that the S&W M60 runs a very close 2nd. I also own a M60 with a 3 inch barrel and do agree it has a sweet DA pull.