Seems like the defending team has a hair trigger on their ults, while my team has to sit on them for 4-5 seconds, as some of the previous posters have mentioned. It is frustrating. I understand if someone is silenced/stunned/etc, but consistently watching my team sit there with a full bar is terribly annoying. Flora becomes worthless. Can't even count the number of times she pops her heal right after the entire rest of the team dies.