Um, no.
Vigilant Guardian was scheduled to begin at 9:00 EST. It had not begun when the first hijacking was reported. Major Nasypany of NEADS was out for a walk when he got word of the hijacking. His first thought was "Somebody started the exercise early." Major Naspany helped to design the one and only hijacking drill – not involving actual aircraft – that was to be run later that day. You actually think that they got word of the real world hijacking and then decided to hold their exercises anyway?
Are you that naive, Wizard?