Not related to firearms, but when setting up control systems for mobile equipment, our software engineers do not seem to be concerned with scan times less than 50 miliseconds, (an eternity for a cnc machine) because it is generally accepted that a human cannot recognize a condition and begin closing the control loop in less than 50 ms.
I do not know what the dwell time of a trigger is, but since the flight time of a 300 wm from 0 to 100yds is right near 100 ms, I am willing to wager that in most firearms, the time from the slipping of the sear to the exit of the bullet is probably some value less than 50 ms.
I feel this is important because, follow through the shot is where the majority of accuracy comes from.
I would have serious doubts that any change in materials or basic mass would be able to improve lock time by an amount that would reduce the total time required to follow through the entire shot using modern equipment. A 10% gain would be a huge gain, and the total change is still going to be somewhere south of 10ms.
I am not arguing that slow lock time is good, but when looking at lock time, consider: how fast is fast enough?
When considering this purchase, I stand with Chad. Spend your money on the item that will make the most difference first. For 99% of us this is: more ammo, better scope, bedding, range time, better barrel. In my case, i can see that i spent $900 more than i needed on a scope, before i bought the right reloading equipment.
For the other 1% who have already made all the other changes they can, it may make a difference.
These kits may be a good idea for other reasons that could bring it to the top of the list, like replacing a poorly designed setup, but buy it for those reasons, not lock time.
FWIW, im just a hack with a little knowledge, so give me a break if you don't agree.