I think another element that adds to the confusion is frequency, as a Total Body W/O 3x/wk practitioner I find that the only time I experience soreness beyond a pleasant "awareness" of the muscles is when starting a new movement, coming back from a lay off or strategic deconditioning, or even when modifying a existing movement in my routine (for example switching from seated military press to standing there will be some trap soreness for the first couple W/o's from the additional "clean" to get it up into position, also even the smallest change in grip position or form can initially lead to this too , for me at least).
I think the confusion may stem from split routine adherents and H.I.T.ers who are hitting the muscle less frequently and may be experiencing soreness because frequency 1 or even 2 times a week may not be enough to condition that particular movement , although adaptation of the body as a whole may still be quite optimal for conditioning purposes overall.
Of course I should qualify all this as simply personal observations and musings not something I feel 100% sure my theory regarding it is airtight so to speak.Fascinating subject , and I find the dynamic of frequency as a possible factor in it to be worth further study.Would be curious to hear thoughts from others regarding thier own experiences with higher or lower frequency of a particular movement vs. frequency of working out overall and how it effected soreness for them.