I did know all this before watching it and knew fully what to expect. I'm not ignorant. My verdict is that it's still crap. If it was supposed to be realistic then how on earth can a video camera battery last for almost 10 hours, how did it survive a nuclear blast, why did a girl they hardly knew risk her life going with them instead of getting the hell out of the city, how convenient wa sit when they stumbled upon a massive make shift hospital whjen they came out of the subway. I could go on. Also in the need to make it seem realisitc they shook the camera to the point of nausea. Absolutely ridiculous.
The Blair Witch Project had already did all this found footage style before anyway so it's not original.