I'm not going to shit on the SS at all. From the videos it looks like they responded as fast as humanly possible given the scenario. Why it took minutes for a response to the people reporting the shooter on the roof is another question, but were they communicating directly with police/SS? It sounded like witnesses were flailing their arms pointing out the roof to perimeter security looking from afar through binos.
As for the counter sniper team, guy was propped up on the tripod, scanning, then took the shooter out within seconds. If he heard incoming rounds and started to duck that's a perfectly normal response. If he was the one that took the guy out, then that is a much better response.
DOS high threat quals give 2 seconds to put 2 shots on standing man sized a target 9 ft away. That sniper took out a shooter in the prone 130m away in about 4 seconds. Keep in mind the guys around the stage would have been focused on the crowd the whole time.
As for the counter sniper team, guy was propped up on the tripod, scanning, then took the shooter out within seconds. If he heard incoming rounds and started to duck that's a perfectly normal response. If he was the one that took the guy out, then that is a much better response.
DOS high threat quals give 2 seconds to put 2 shots on standing man sized a target 9 ft away. That sniper took out a shooter in the prone 130m away in about 4 seconds. Keep in mind the guys around the stage would have been focused on the crowd the whole time.