I don't think the TB20 is a "typical" anything, what with being a fairly rare and esoteric aircraft. I don't know if the Malibu is all that indicative either, especially since I would think both of these are engine- and not wing-limited as far as ceiling goes.
However, for a little reading on aspect ratios and related issues, go here:
quest.arc.nasa.gov/aero/wright/teachers/pdf/math/Aspect_Ratio_of_Wings.pdf