That is my take on them, exactly the same way that adding dihedral has the effect of raising the wing.. and vise-verse.
Could be wrong but it's always been my quick fix. A lot simpler than re positioning the wing or stab.
This shark fin and T-Can thing really is something though... specially for a monoplane.
Expect to see derivatives on full sized aerobats in the comming years.

Here's a sketch of a design concept done at least 8 years ago intending to use counter rotating props.... that wasn't available.
Shark fins/T-Cans top and bottom. Smaller wings etc.
Not so much a plane... more a machine designed to carve lines.