Yes, Doc, and I have also called it a "cobra style" horn...
The idea of these is that, at neutral, the pushrod from the bellcrank comes to the flap horn at right angles at neutral, and the pushrod to the elevator leaves the flap horn at right angles, at neutral.
From several studies I've played with over the past few years, this gives the LEAST variance from "proportional" response to upright or inverted control inputs.
Keep in mnd that RCers use strange angle servo and horn hookups on the aileron output servo wheels to get differential aileron. W/o that, they find outrageous adverse yaw problems - just the things we DON'T want to have to try to trim out over dozens of flights...
I wish y'all the Happiest Christmas, and Merriest of New Year's 2007!