no, it was reported on our field by the Magnums designer
the thinking was flat plates fly at an AOA to make lift, that made everything on the plane draggy, this section cut that drag.
the old Magnum and new feel pretty much the same, both are rock soild at high speed, but the foam winged is much better at gliding home, it also responds better in areos and the stall speed is lower. The old wing came as 1/4 balsa you carved, very hard to get right both sides so the foam solved that. the new plane is alot lighter than the old, part of that may be the way it's built now, but the white foam core with 16th balsa skin is niceeeeeeeee