No, never said that. I'd expect floors stacked up, like in the other progressive collapses. Of course, those were different types of construction. Steel framed skyscrapers have never had progressive collapse.
Guys, look at the arial pictures. Two 110 story buildings disintegrated. Relative to the size of them, there is almost nothing left. We see plenty of perimeter sections, but perhaps not all of them. We see almost none of the core structure. Where is it? 47 columns x 1300 feet x 2 towers, plus cross bracing. Where is it all? There are stubs of the cores, but what happened to 2600 feet of core structure? And floor assemblies. If this building really "fell down" on itself, straight down, there would be a 110 layer sandwich - steel pan, concrete, crushed office contents, steel pan, concrete, crushed office contents, etc.
Wake up. Those towers were blown to kingdom come. There was 1" to 2" deep dust over a couple of square miles. Guess what? That accounts for the towers.