Hmm,
Things obviously vary from type to type, from the B767 Ops Manual SP.16.7
"Testing of undiluted de-cing/anti icing fluids has shown that some of the fluid remains on the wing during takeoff rotation and initial climb. The residual fluid causes a temporary decrease in lift and increase in drag, however, the effects are temporary. Takeoff operations with reduced thrust (assumed temperature method or fixed derate) are permitted provided takeoff performance accounts for the runway surface condition. Use the normal takeoff rotation rate."
It might have something to do with the higher thrust to weight ratio of the B767.
Regards,
BH.