I don't know if anything is stated anywhere.
I usually expect 1000' per minute average (up or down), except for climbing A340 and long hauls shortly after their departure.
Experience shows that 3000' in descent is possible with no big fuss. I ask first if I need more.
I reckon it mostly depends on type of aircraft and the current flying conditions. Company policy, technical reasons, pilot's mood being factors we've got to deal with too... This can't be stated.