On the Hawker, we regularly do flap 0 take-offs. The second segment climb performance is calculated using our computerised programme and/or the aircraft manual and is often better than using flap 15 ( not to mention one less action to undertake at a particularly busy stage of the flight).
Some flight departments like to standardise procedures for all types and this could range from a Citation up to an Airbus. Clearly there are different requirements for different aircraft and a one size fits all policy sometimes appears a little non-sensical. Airmanship dictates how we operate and any variations from SOPs are discussed beforehand and need to justifiable to the men in suits at any subsequent board of inquiry.
AP