I posted this in the another place on the net where there are a lot of experts and pro pilots. CAPtain232 frequents the site and weighed in on the issue as well. I would take what he says very seriously b/c being a custom builder that gets paid for working on models he better know his stuff. I think CAPtain232 hit the nail on the head with what he has said.

Flapperons have more than one definition. In the text book and in the R/C world prior to 3D then CafeenMan would be correct and is still correct for certain types of flying. However, a lot of the 3D anf funfly crowd has redefined Flapperon by mixing in elevator with the Flapperons. My guess is we stole the term from the scale crowd. If you notice when a fullscale comes in to land his flaps are DOWN and when he flairs he Pulls back and his elevator goes UP. My theory on the 3D orgin of the word is that since the ailerons are down and elevator is up and we dont have flaps on our planes then we will just call this flapperons.

tiggerinva,
Notice what Mike said when he defined spoileron. Ailerons UP Elevator UP. That doesnt define what we call it when Ailerons are UP and Elevator is DOWN.

If you are just old fashioned and dont want to budge on what you define flapperons as then go for it. But the technology of new radio systems have allowed us to redefine it for a certain type of flying.