What I have witnessed on WJ airplanes was a little more than what you state. But hey, who am I to judge? You guys know your airplanes, I don't. I remember some years ago a 737 going in the Potomac River off DCA. The Capt thought it was just a little snow on the wings. No big deal. Luck will only last so long. Eventually it runs out. Don't be a hero cause at the end of the day, Clive will be more angry if you destroy one of his airplanes than if you spend a little money on deicing. If you guys don't buy that concept, I wouldn't put my wife and kids on your planes.