The new Insights wheels are mostly flush when viewed from the sides ( no really bad protrusions or cavities.
Not sure about the production car though.
( Just curious about the angle of the underside just past the rear bumper - is the angle aerodynamically correct ? )
Another thing that puzzles me is how the Cd is so good on the Civic sedan, yet it has such a short trunk. From what I understand, if there is airflow seperation, you usually need a long trunk, or a high spoiler to reattach the turbulent airflow and straighten it back out.