I was there, but did not go through the “simulation”. They ran out of time. It was a very rushed project, and had a lot of problems.
For example, the “attackers” were instructors at the facility who had done “house clearing” exercises in the same set-up, hundreds, if not thousands of times. There were, literally, lines on the floor to remind them of precisely how to “pie slice” when checking out a room, not that they needed them with that much practice in that setup.
The “defenders” had just got there, and were forced to wear full face covers that many said fogged so badly they could barely see out of them.
The “attackers” wore ballistic sunglasses, that did not fog.
There was good intention behind the “simulation” but as another poster mentioned, the variables are too many for a scientific evaluation.
TTAG expects to run more simulations, but with more time for preparation and more consideration of the protocols.
The project was designed to get into the news cycle with the Hebdo shootings.
Not a good plan if it introduces the wrong results into the news cycle. That they picked top-notch and experienced professionals as the gunmen is an obvious mistake. That they knew there was an armed "victim" is another mistake.