If you have actually been paying attention to the news instead of letting your itty bitty jockstrap get into an anti-gay wad, you would know that many of the victims died from their heads being blown off. That means that identification takes much longer.
No, the head is a much harder target to hit in order to achieve that; especially in moving targets. I'm not buying that at all. Unless the guy was an experienced duck hunter or something too. You can ID a body after you remove it.
They didn't order men in for a day or two because they wanted to reduce the risk of HIV exposure in the biohazard crime scene. The police even commented on how they turned the AC on high in the club to preserve the bodies as they lay there for a day or two; before removal started. Nothing to do with id on the victims. Identification could be much easier once they got to the body and removed its wallet, for instance.
Even still, I wouldn't want to be on the forensic team having to do all that bloody work, inside or outside the club. Would you?