Just a little follow up.
Both my Pro's were bought new this year and have a very faint reset. Did some reading and S&W has changed the trigger bar, marked with an H, and the slide release to give a better felt reset.
My pro's have the H trigger bar, but not the new slide release. I just ordered 2 from G and R tactical and will change it out when they come in.
My friend just traded into a new regular M&P and the reset is very distinct, although I haven't looked at the parts, I'm sure it has the new updates.
Another little tidbit, his gun has the sear housing block that is made for the thumb safety model, (Sounds like S&W has standardized to this part) which doesn't have the hole for the APEX Ram, both of my Pro's have the other sear block that allows the Ram.
Sorry, bored tonight while the infant is sleeping.