"A sec" is very ambiguous. Asking someone if they have 15 minutes to talk about the new deployment is much more useful and allows people to prepare for it, shortening required time to converse and providing you with more useful answers. Everyone benefits
For obvious reasons I avoid this as well. However, sometimes it's just simpler to take somebody aside without specifying context (or very vague), because somebody else in the group might feel VERY STRONGLY about that new deployment, overhear that it's about that and try to inject themselves
