Guys and Girls please also note that 160kts to 4nm etc is an ATC request, if you accept then you have to fly it.
If you cannot for any reason tell them, and tell them what speed profile, i.e. 160 to 5nm you can accept.
Remember you are in charge of the machine not them. I know that we follow what they say usually without question, and it works well. But at the end of the day the buck stops with you.