That is a very good article. My current boss has a saying, "What gets measured, gets done." What that translates to is this. Unless you know where you came from, and where you are going, you will doom yourself to little or no improvement. By measuring things you have a base to gauge improvement or loss. It is very true there isn't a timer in a gun fight, but if you are training, how do you know your training is helping you or hurting you? Timers are good, repetition makes it consistent.
Frank