Thanks, Jeff - I understand that phenomenon from sport and trainer models.
I was curious about the tradeoff with inverted maneuvers in a pattern aircraft (as if my flying skills would make that noticeable).
However, in reviewing a number of pattern designs thru around 1980, I find that most incorporate some dihedral.
Another factoid I discovered had to do with tapered wings and their tendency toward tip stall. Since a pattern plane doesn't want to use washout to counter tip stall, the early designers did two things: made the wingtip leading edge slightly more blunt, and/or used a slightly thicker airfoil towards the tip to add lift. For example, a NACA 0015 enlarged to a NACA 0017 at the tip. The old magazine articles from the late '60's through early '80's are quite informative.

PJ