I appreciate the feedback guys. Mattel cartridges like locknchase are programmed with a 20hz cycle on reading the controller (worse if you are playing a slower speed). Other than that there should be no latency on controller input using real hardware. Locknchase is notorious for its controls, and you do have to get use to being early on turns, and that's likely due to poor programming. You can compare with Atarisoft Pac-man, or even Carl's mspacman which is extremely responsive even in emulation. Don't know for sure but Carl's might be programmed to read the controller and update graphics at 60Hz. Another thing to consider is that unless you are using a standard CRT each brand of television can introduce varying amounts of lag, some can be quite bad. If you played Intellivision skiing a lot you might notice a difference in emulation.
All of what you say may be true...but its a non event to me and the way i play.
Again, Billy Mitchell has refused my offers to challenge him on Triple Action or Math Fun :-)
At 49 years old, i just enjoy the nostalgia of it all.