It's surely not a new technique- I've a 1955 .45acp Hand Ejector Smith&Wesson that someone performed this mod upon. They chromed only about 1/3 of the trigger and 1/2 of the hammer. The rest is still color case hardened. Plus, most older "stainless" steel Smiths have hard chromed hammer and trigger units- they seem to hold up OK...
I'm just not sure what all the fuss is about- I LIKE a two stage trigger, so much so that I've retro-fitted most of my ARs w/ Geissele FCGs, including an SSF and SSA units.
Take up crunchiness doesn't bother me, just so long as the final break is clean and repeatable.(Even if there's a "double step" in the last pull its OK, as long as it is the same every time.) I don't think I've ever had a L-E with a "too heavy" pull.
Of course, my opinion of rifle triggers may be somewhat influenced by years of shooting revolvers double action w/ some degree of accuracy and speed...Still haven't mastered Mk.VI Webleys, though!