hotmetal, as eyeinthesky says, there are the few who with the delay information still go full pelt. I have no idea who the few are going to be, so everyone gets the same instructions to slow down asap. Overcontrolling from your part is safely and orderly in my world, numbers one and two on my list of goals.
Not Long Now, not always. Sometimes it is just as easy to say "when able 250kts" just to keep them away from the stacks a bit longer, no longitudinal separation reasons at all. Use this when very busy.