1) After collapse initiation, the collapses of the Twin Towers as recorded on many videos proceeded within the normal laws of physics, without any need for assistance by explosives.
Indeed, explosives would have noticeably disturbed the natural motion and destruction. Further, observation of the wreckage shows that the perimeter broke into sections by breakage of the bolts at the box section ends, not by melting or explosion. Dust was produced predominantly in the final crush of the internal collapse hitting ground, not evenly throughout collapse as the proposed sequenced detonations would have done.
2) I regard that testimony as reasonably accurate – after any incident, testimony of different witnesses shows considerable variation. But nearly all such reports concern loud bangs before and up to the time of collapse initiation. There are not widespread reports of percussions in a timed, accelerating sequence during collapse progression.
3) You seem not to have read what I have written; I wrote that I agree with the late Danny Jowenko, the Dutch demolition expert. I suspect that WTC7 may have been subjected to emergency demolition, decided upon and executed shortly after the collapses of the Twin Towers, so that the fire-fighters could continue rescue operations in the WTC7 exclusion zone.
My disagreement is one only of semantics; this could not be called a controlled demolition, because the word “controlled” in the term “controlled demolition” refers to guarantees of limiting the extent of adjacent damage. This would have been neither reasonable nor possible in the chaotic environment of 9/11; just for starters, WTC7 was on fire.