A point of perspective...
Throughout most of early 2001, conspiracy theorists were speculating that "something big" was coming soon. A few "friendly insiders" were contributing to RumorMillNews.com, and the (small at the time) online conspiracy community was poised for ... "something".
Conspiracy speculation related to PNAC and some N.E.S.A.R.A. nonsense began immediately. And in fact, the earliest theories involved a "faction war" among intelligence agencies, and not the Bush administration.
The people on my site were picking up on conspiracy speculation right away... but none of the early theories involved "no planes" or "controlled demolition"... the experienced conspiracy people were interested more in:
- foreknowledge and cover-up
- missed intelligence and cover-up
- potential covert maneuverings of Taliban to inspire Iraq invasion
- internal agency bickering and cover-up
Within six months of the attack, a long time conspiracy radio show guy we always thought was "way out there" warned us that really crazy theories would be surfacing soon, and all hell was going to break loose in 9/11 conspiracies.
Unfortunately, the early edition of our board during that time (running IkonBoard) crashed hard and all data was lost... but just about any "conspiracy theory" board that was up and running then contains similar discussions.
Then came the no-plane theories, controlled demotion, pods on the planes, and 9/11 Truth.
So... the Internet firestorm of 9/11 conspiracies began immediately, it's just that the online conspiracy theory community was small at the time, and not overrun by activists looking for a reason to be angry.