You are really giving KJS the benefit of the doubt. There is no credible evidence that he did indeed get a lemon, or two. All we have are his hyperbolic claims, an off-the-wall rant at S&W and no follow-up as to what the problems actually were.
I suspect that the gun that "fell apart" actually had some screws come loose. Recoil impulse can do that. I routinely check screw tightness when I clean my revolvers. I've still have had screws back out to the extent that in the middle of a reload, during an IDPA stage, I found myself holding the cylinder and crane assembly in my left hand and the remainder of the firearm in my right. Crane screw backed out - S&W's fault? I don't think so, but I bet KJS would.
We still don't know whether it was a simple tightening of the strain screw that fixed his light strike dilemma, and may never since he was in such a rush to condemn all things S&W - he probably sent it off before he checked the easy things first.
He also seems to not realize that one of the functions of a forum such as this is for the more knowledgeable to mentor those that are just learning about their firearms - a place to garner knowledge. His initial post and his responses border on "trollism".
I didn't start out to make this a personal attack on KJS, but as I read through this thread, it seems that it has imparted very little constructive information and a lot of vitriol. I apologize to the forum if you think I am out of line.
Adios,
Pizza Bob