A few years ago I spent a winter week at a Vigilant VGS supervising cadets on a course. While I can't remember the specifics I am sure that the SOP was to climb out 5kts lower than the book speed for "noise abatement" purposes.
This recollection doesn't seem to match with information plucked from a 109B resource on the Internet but it is quite a clear memory and I'd appreciate it if current crew could advise.
If this is true, could this be contributing to an increase in carb icing in the Vigilant fleet?