Your comments suggest the definitions used in this discussion could be refined. It may be advantageous to define "tuning". Tuning is a catch-all word for a process. I would separate the process by separating the two actions i.e., setting the pin (turning, impacting, or flag poling) from listening. I set the pin on attack and listen during decay.
Interesting you mention that ETD's take too long to process. I've been aware of that from the beginning of time. I have used a strobe tuner because of that irritating millisecond "delay" associated with digital equipment. Strobes (analog instruments) are instant. They read at the same rate as the ear.
Interesting comment by Ed McMorrow. I'm sure we all have noticed the "doppler type" of effect when someone is walking by you during tuning, as well as ceiling fans rotating.