Good question! My (literal) reading of the manual is that this only occurs with the air/ground sensor in 'Flight', so the answer SHOULD be 'No', but as with all things, worth looking into!
WRT yr last paragraph, I understand that the 10 kts is to avoid the activation of the 'modified' stick shaker etc rather than because of aerodynamic disruption? I would hazard an answer that it is probably worth doing anyway AT ANY OAT/TAT for the trouble it will cause - that way all is covered?
NB The engine anti-ice will have the same effect if in use at the time.
Any Boeing experts here?