(1) One complaint is that much of the jet fuel burnt outside the buildings. This was particularly true in the case of the south tower. After the impact nearly all of the jet fuel would have been spread throughout the area as a flammable mist. When this mist ignited it would have emptied the building of almost the entire fuel load, which then "exploded" outside the building. This is exactly what was seen in the videos of the impacts.
<要約> 特に2機目が激突したWTC2では、ジェット燃料のほとんどはビルの外で燃焼した。激突後、ほぼ全ての燃料は可燃状態の霧として広がった。これに引火したときにほとんど全てがビルの外に押し出されて、そこで爆発が起こった。
(3) The jet fuel fires were brief. Most of the jet fuel would have burnt off or evaporated within 30 seconds, and all of it within 2-3 minutes (if all 10,000 gallons of fuel were evenly spread across a single building floor as a pool, it would be consumed by fire in less than 5 minutes). The energy, from the jet fuel, not absorbed by the concrete and steel within this brief period, would have been vented to the outside world.
<要約> ジェット燃料の燃焼は短時間だった。大半の燃料は30秒以内に燃え尽きたか、蒸発していただろう。全ては2,3分以内に燃え尽きた。このエネルギーはコンクリートや鉄に吸収されることは無かった。
Imagine that the entire quantity of jet fuel from the aircraft was injected into just one floor of the World Trade Center, that the jet fuel burnt with the perfect efficency, that no hot gases left this floor and that no heat escaped this floor by conduction. With these ideal assumptions we calculate the maximum temperature that this one floor could have reached.
その結果は、「ジェット燃料だけによっては、その階全体を280度c以上にすることは不可能だ」と言うことです。
We have found that it is impossible the jet fuel, by itself, raised the temperature of this floor beyond 280ー C (536ー F).
"The Boeing 767 is capable of carrying up to 23,980 gallons of fuel and it is estimated that, at the time of impact, each aircraft had approximately 10,000 gallons of unused fuel on board (compiled from Government sources)." http://www.uscrusade.com/forum/config.pl/read/1064
When I saw the rapid collapse of the towers, I knew that they could not come down the way they did without explosives and the severing of core columns at the base. The spewing of debris from the towers where the planes entered also could not have occurred simply with just a structural collapse. Something else was happening to make this occur.
Moreover, the symmetrical collapse is strong evidence of a controlled demolition. A building falling from asymmetrical structural failure would not collapse so neatly, nor so rapidly, as you have pointed out.