Well the speed of the breeding depends on what temperature the room is. I keep my ASF's in my snake room ( no odor, yay! ) and it is kept at a constant 80 degrees. If they are at a lower temp, they don't breed well if at all.

If you feed your grow-ups different foods, they grow quicker. I feed mine KENT 23% protein rodent diet and they go from weaned to adults in about a week and a half to two weeks.