Ned is talking about various uses of mixing, ie elevator->flap or elevator->spoiler mixing, which is not the same as just having flaperons or spoilerons or what have you.
Right,
Thats why I opened with this statement
Flaperons, Spoilerons typically in RC aerobatics planes is talking about ailerons that react via a mix to what the elevator is doing.
Now real planes that actually had flaps but the scale model is only equipped with ailerons or I suppose anywhere a preson wanted to take advantage of ailerons working on independant servos, sure flaperon/spoilerons can be used as an on/off thing and varied via a slider or dial.
I was strictly referring to how they are typically used for aerobatics.