There appears to be a degree of sophistication and coordination which is typically lacking in the Lanza/Holmes types. Not saying a psychotic schizophrenic type isn’t capable of executing a semi-sophisticated and coordinated attack like this but it seems more consistent with something you would see in Iraq or Afghanistan. If it turns out it was a Lanza/Holmes type, it pretty much sucks all the air out of the left’s anti-gun arguments. If it was a islamic terrorism, Obama is going to have some ‘splainin to do.
However, it could have been carried out by a local group not really connected with any true terrorist network. We've seen that "copycat" scenario play out many times.