Both theories seem plausible. As a matter of fact, the free fall thing always rang a little false to me since the buildings should have collapsed at a slightly slower rate.
There’s something awfully suspicious about WTC7 too, as the article author points out other buildings were closer to the main towers and sustained damage. Yet they did not collapse. I recall the pictures I’ve seen of telecommunication systems hanging by overhead cabling. Yes, 110 type punch downs are pretty damned strong, so too is wire wrap, etc. But to this day those buildings are still standing.
WTC7 sustained relatively little damage, yet it dropped too. I think what leads many to believe in a conspiracy is the lack of information and the lack of answers to many questions. After all, if the government had no part, wouldn’t it be in its best interest to give us some answers to the more pressing questions about 09/11/2001. Plausible deniability is always highly suspect. Ask yourself, who is our government? If you answered corporations you get the gold star. And what is the motive of a corporation? To make money.